http://colander.readthedocs.org/en/latest/ http://colander.readthedocs.org/en/latest/ Is really mature and I've found it to be a wonderful tool - it has an add

http://colander.readthedocs.org/en/latest/ http://colander.readthedocs.org/en/latest/ Is really mature and I've found it to be a wonderful tool - it has an addon called Deform for serializing forms into colander schemas but colander is not limited to that. I've used it for creating "schemas" for API endpoints and validating them. It would be nice to use it DB backed ORMs but even there you're kind of covered with a SQLAlchemy Colander attachment...