class Pair(Generic[T, U]):

Type System & Annotations

Meaning

Defines a generic class Pair with two type parameters T and U, representing a pair of two values.

Primary Function

Defines a generic pair type for holding two values of potentially different types.

Communicative Purpose

To define a generic type for a pair, enabling type-safe pairing of two values.

Função primária

Defines a generic pair type for holding two values of potentially different types.

Propósito comunicativo

To define a generic type for a pair, enabling type-safe pairing of two values.

Situações de gatilho

When a generic pair type is needed, e.g., returning two values from a function, representing a key-value pair, or creating a generic container for two elements.

Contextos

Used in type annotations, generic programming, data structures, function signatures, and generic algorithms.

Examples

def parse_input(line: str) -> Pair[int, str]: parts = line.split(':') return Pair(int(parts[0]), parts[1])

point: Pair[float, float] = Pair(3.0, 4.0) print(f'Coordinates: x={point.first}, y={point.second}')

def swap(p: Pair[T, U]) -> Pair[U, T]: return Pair(p.second, p.first) pair = Pair(5, 'hello') swapped = swap(pair) print(swapped.first, swapped.second) # Output: hello 5