mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- Disable comparison overlap checks in assert statements
- Opt-in error for `if x:` when `x: None | int` or `None | str` etc.
- Sketch implementation of "optional-non-truthy" check for `if x` with `x: None | str`
- Implement support for "mypy: ignore" comments
- Inconsistent "Incompatible return type" error when `List[int]` is returned for `List[Union[str, int]]` when layered up with Tuple/Union
- [Documentation] Minor change: Unify indexes in Variance of generic types description
- Fixes issue #17840 (shows signature of __call__ for incompatible function argument)
- overload with wrong return type is ignored
- Iteration over a Enum fails to typecheck if it's the Flag subclass
- False negative when lvalue has union type
- Docs
- Python not yet supported