from _heapq import *
from _typeshed import SupportsRichComparison
from typing import Any, Callable, Iterable, TypeVar

_S = TypeVar("_S")

__about__: str

def merge(*iterables: Iterable[_S], key: Callable[[_S], Any] | None = ..., reverse: bool = ...) -> Iterable[_S]: ...
def nlargest(n: int, iterable: Iterable[_S], key: Callable[[_S], SupportsRichComparison] | None = ...) -> list[_S]: ...
def nsmallest(n: int, iterable: Iterable[_S], key: Callable[[_S], SupportsRichComparison] | None = ...) -> list[_S]: ...
def _heapify_max(__x: list[Any]) -> None: ...  # undocumented