mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- int.__truediv__() accepted by Protocol that effectively requires that an int is returned
- Fix narrowing unions in tuple pattern matches
- Use of ```not``` keyword does not always narrow out type ```None```
- Improved error message from: [directory] is not a valid Python package name
- 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`.
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- Python not yet supported