mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- False negative: isinstance() guard removes parameterisation by `TypeVar`
- Show type aliases in error messages
- Incorrect status of name in class def or module level, before being assigned or after being deleted.
- Returning optional union from method complains about `got "object"`
- mypy-lang.org About page is quite outdated :-)
- datetimes `__sub__` is not symmetrical in subclass.
- Narrowing an optional class type to an unrelated Protocol causes a false unreachable error
- Tweak the mypy badge to include the word "type"
- Making a variable optional in an `else` block doesn't work for `try`/`else`
- Weird error message for incompatible override when using a `TypeVar` for `self`
- Docs
- Python not yet supported