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Smart Code Inspections for Python Type Annotations

Simplify, modernize, and validate your Python type hints with 21 intelligent inspections and one-click quick fixes.

Union & Optional Simplification

• Union[int, None] → Optional[int] • Union[X, object] → object • Union[X, Any] → Any • Union[dict] → dict • Optional[Optional[X]] → Optional[X] • Union[int, int, str] → Union[int, str] (remove duplicates) • Union[int, bool] → int (bool is subtype of int) • Union[Union[A, B], C] → Union[A, B, C] (flatten nested) • Detect invalid Union[]

Modern Pipe Syntax (Python 3.10+)

• X | object → object • X | Any → Any • (X | Y) | Z → X | Y | Z • (X) | Y → X | Y

Syntax Conversion (disabled by default)

• Modernization: Union[X, Y] → X | Y, Optional[X] → X | None • Backward compatibility: X | Y → Union[X, Y] • PEP 585: List[int] → list[int] • PEP 695: TypeAlias → type statement

Advanced Inspections (disabled by default)

• Missing Optional for parameters with None default • Simplify Callable[..., Any] → Callable • Redundant Generic[T] in class definitions • Unbound TypeVar (used only once) • Protocol methods without type annotations

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