PyMeta3

PyMeta3 is a Python 3 compatible fork of PyMeta, an implementation of OMeta, an object-oriented pattern-matching language. It provides a compact syntax based on Parsing Expression Grammars (PEGs) for common lexing, parsing, and tree-transforming activities in a way that's easy to reason about for Python programmers. The current version is 0.5.1, with the last update released in February 2015, suggesting a low release cadence.