I'll shamelessly piggy-back here, and note that I'm working on a different type of type-safe validation library for Python here: https://github.com/keithasaurus

I'll shamelessly piggy-back here, and note that I'm working on a different type of type-safe validation library for Python here: https://github.com/keithasaurus/koda https://github.com/keithasaurus/koda. I'm nearing an initial release, but am still working on some of the docs, naming, and things like that. If anyone would like to give feedback, I'd be grateful!