The 3.0 release of pyparsing includes some nice extensions over its older 2.x code base, including LR parsing support and railroad diagram generation. Also, PEP

The 3.0 release of pyparsing includes some nice extensions over its older 2.x code base, including LR parsing support and railroad diagram generation. Also, PEP-8 API naming has been added (but with pre-PEP-8 synonyms defined for legacy compatibility). https://github.com/pyparsing/pyparsing https://github.com/pyparsing/pyparsing (Disclosure: I am the author of pyparsing.)