mypy
https://github.com/python/mypy
Python
Optional static typing for Python
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- Issues
- `func-returns-value` false positive for union type?
- No-field class derived from `dataclass_transform` base class uses base class's constructor signature
- Comparison operators emit "Unsupported operand types" when using `isinstance` to narrow `TypeVar` to union of numeric types
- `[mypyc]` indexing fixed-length tuples is extremely slow and gets slower with increse in length
- join is not symmetric for type[X] vs class object X
- `Final` nested inside `ClassVar` results in `Any`
- unexpected "var-annotated" when using constrained TypeVar
- Specify behavior for `Literal?` types.
- Unclear when Join is picked vs Union in upcast operation.
- Always try to report missing protocol members
- Docs
- Python not yet supported