mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- Mypy does not narrow class type when a `→ NoReturn` (`→ Never`) member method is called
- confusing type error when using overloads
- Error: "Local variable "x" has inferred type None; add an annotation", while annotation seems to be provided.
- Descriptors and ClassVars
- `tuple` of different `type`s narrows to `object`
- Signatures of *in-place binary operation* and *binary operation* are incompatible
- TypeChecker.lookup_qualified can't find names in submodules
- no error when calling abstract `staticmethod`/`classmethod`
- Platform check is not remembered after `return`
- False positive passing default valued arguments to lambda
- Docs
- Python not yet supported