[iknownothow]

This pales in comparison to Pydantic in terms elegance, flexibility and batteries being included. But pydantic is quite slow.

I discovered pydantic-core [1] which is a backend of sorts for pydantic written in Rust. It is yet to be integrated into pydantic, but once the integration is done, the author expects a potential 10x speed improvement.

[1] https://github.com/samuelcolvin/pydantic-core