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| PLY is yet another implementation of lex and yacc for Python. Some notable |
| features include the fact that its implemented entirely in Python and it |
| uses LALR(1) parsing which is efficient and well suited for larger grammars. |
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| PLY provides most of the standard lex/yacc features including support for empty |
| productions, precedence rules, error recovery, and support for ambiguous grammars. |
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| PLY is extremely easy to use and provides very extensive error checking. |
| It is compatible with both Python 2 and Python 3. |
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