from __future__ import annotations from typing import Callable, Iterable, TypeVar T = TypeVar("T") def partition( pred: Callable[[T], object], iterable: Iterable[T] ) -> tuple[list[T], list[T]]: """Partition a sequence in to two list from a given predicate. The first list will contain the values where the predicate is False, the second list will contain the remaining values. Args: pred (Callable[[T], object]): A callable that returns True or False for a given value. iterable (Iterable[T]): In Iterable of values. Returns: tuple[list[T], list[T]]: A list of values where the predicate is False, and a list where the predicate is True. """ result: tuple[list[T], list[T]] = ([], []) appends = (result[0].append, result[1].append) for value in iterable: appends[1 if pred(value) else 0](value) return result