Lex and Yacc-like tools written in Python
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 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