mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- (🐞) Strings as `TypeAlias`s are incorrectly assumed to be `type`s
- (🎁) Special case `NoReturn`, `Never`, `Self` and `TypeAlias` to not be subscriptable
- (🐞) An error should be reported when `reveal_type` is used but not called
- isinstance wrongly narrows away Any
- (🎁) `isinstance`/`issubclass` only accept `typing.Union`s of `type`s, not other type forms
- (🐞) `|` operator with `_SpecialForm` determined to be `types.UnionType` it's actually `typing.Union`
- Allow unsafe overrides in sub-subclasses that are compatible with subclass
- (🐞) Artificially literal bools not considered when performing reachability checks where branch terminates
- Error on instance property and init-only variable with the same name in a dataclass
- Errors not always reported for a file in incremental mode (reopening #4043)
- Docs
- Python not yet supported