mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- When given directory mypy only analyzes files with PY_EXTENSIONS
- Mypy/dmypy takes over 16GB of memory
- Incorrectly narrowed Literal in while loops
- Combining two type checks with `and` deduces `Any` if the first is `Any`
- Incorrect widening of `T | None` with unions to `builtins.object` in generic functions
- Keep `TypeVar` arguments when narrowing generic subclasses with `isinstance` and `issubclass`.
- Mypy does not honor implicitly abstract class in stubs; false positive about ABCMeta
- Report protocol problems in no_variant_matches_arguments if possible
- ParamSpec with Concatenate issue when function has union and kw args with strict=True
- Args with a generic type will use the mother type, rather than a literal
- Docs
- Python not yet supported