devel/py-ply 3.11p9 OpenBSD

PLY is an implementation of the lex and yacc parsing tools written 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.

It's been abandoned upstream and not expected to be maintained any more.

Note: do *not* use the undocumented 'picklefile' parameter with untrusted or externally writable files - Python's pickle module permits execution of embedded code during deserialization, so a malicious pickle file can execute arbitrary code during parser setup.