mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- Type annotations in class instance attributes on variable definition by execution order vs lexical order
- (🐞) `always-true`/`always-false` doesn't activate until it's truth is checked
- generic with union value inferred as common base
- (🎁) multiple platform/version compatible mode
- `isinstance(x, CallableType) and x.is_type_object()` is a code smell
- (🐞) No error with `disallow-any-generics` and `type`
- TypeVar bound to Callable confuses Mypy
- dmypy does not detect the --no-color option
- Incorrect errors caused by boolean narrowing on attributes
- (🐞) Wrong column number for name-defined when assigning to same symbol
- Docs
- Python not yet supported