[psychoslave]

I don't know Pyright, but is it still Python? It's probably fair to bring it as Sorbet is mentioned, if course. But you can't use Sorbet using a pure ruby interpreter, if I'm getting it correctly, and I guess it's the same for Pyright. It's that so?

[thenipper]

Mypy/pyright aren’t interpreters. They’re basically just linters that you run against Python code to see any typing issues. I don’t mean that dismissively,they’re great tools.

[maleldil]

Pyright and mypy are typecheckers, completely orthogonal to the interpreter. They work like linters that statically perform type checking. By default, Python's type hints are ignored at runtime (i.e. you can do `x: str = 2`, and the runtime doesn't care), but there are tools to perform runtime checks (e.g. beartype) and libraries that make use of types as metadata (e.g. dataclasses, Pydantic, FastAPI).