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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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