Top 4 Python Typesafe Projects

strictyaml

21 1,407 1.9 Python

Type-safe YAML parser and validator.

Project mention: StrictYAML | news.ycombinator.com | 2023-09-29

koda-validate

10 108 5.2 Python

Typesafe, Composable Validation

Project mention: Pydantic V2 leverages Rust's Superpowers [video] | news.ycombinator.com | 2023-04-23

As someone who built a pure python validation library[0] that's much faster than pydantic (~1.5x - 12x depending on the benchmark), I have to say that this whole focus on Rust seems premature. There's clearly a lot of room for pydantic to optimize its Python implementation.
Beyond that, rust seems like a great fit for tooling (i.e. ruff), but as a library used at runtime, it seems a little odd to make a validation library (which can expect to receive any kind of data valid python data) to also be constrained by a separate set of data types which are valid in rust.
[0]: https://github.com/keithasaurus/koda-validate

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simple_html

1 32 6.2 Python

fast, templateless html generation

Project mention: Fast, templateless HTML generation in Python | news.ycombinator.com | 2023-11-25

mocksafe

2 3 6.4 Python

Type-safe mocking for Python.

Project mention: I made a type-safe mocking library | /r/Python | 2023-05-15

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-11-25.