PLY is yet another implementation of lex and yacc for Python. Although several other parsing tools are available for Python, there are several reasons why you might want to take a look at PLY: * It's implemented entirely in Python. * It uses LR-parsing which is reasonably efficient and well suited for larger grammars. * PLY provides most of the standard lex/yacc features including support for empty productions, precedence rules, error recovery, and support for ambiguous grammars. * PLY is extremely easy to use and provides very extensive error checking.

This package contains the Python 3 module.