mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- Many classes should be decorated as `@final`
- Protocol restriction in generics do not work in methods. But work on functions.
- false positive: "Overloaded function signatures ... overlap with incompatible return types"
- Support return/raise statements within a version/platform check.
- Argument type `Union[T, List[T]]` fails to infer constaints
- Meta issue: better `getattr` support
- Warn that annotations could be if TYPE_CHECKING
- Use mypy to find backward incompatibilities between library versions
- "--install-types not supported in this mode of running mypy" even with `--non-interactive`
- dict literals inferred like immutable Mapping
- Docs
- Python not yet supported