from typing import Union, Optional

Type System & Annotations

Meaning

Imports Union and Optional type hints from the typing module for use in type annotations.

Make Union and Optional type hints available for annotating variables, function arguments, and return types.

Signal that the module uses typing features and make Union and Optional available for type hints.

Função primária

Make Union and Optional type hints available for annotating variables, function arguments, and return types.

Propósito comunicativo

Signal that the module uses typing features and make Union and Optional available for type hints.

Situações de gatilho

When you need to specify that a variable or parameter can be one of several types (Union) or may be None (Optional).

Contextos

In Python modules that use type hints, especially in function signatures, variable annotations, and return type annotations.

Família do chunk

Tag de espaçamento: Immediate

def process_value(value: Union[int, str]) -> str: return str(value)

def get_items() -> Optional[List[int]]: if condition: return [1, 2, 3] return None

def parse_data(data: Optional[Dict[str, int]]) -> int: return sum(data.values()) if data else 0