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
This package contains the Python 2 module.