SlackBuildsOrg/python/pyparsing
..
pyparsing.info
pyparsing.SlackBuild
README
slack-desc

The pyparsing module is an alternative approach to creating and
executing simple grammars, vs. the traditional lex/yacc
approach, or the use of regular expressions.  The pyparsing
module provides a library of classes that client code uses to
construct the grammar directly in Python code.