Function cancel

src/black/concurrency.py:50–54

asyncio signal handler that cancels all `tasks` and reports to stderr.

(tasks: Iterable[asyncio.Future[Any]])

def cancel(tasks: Iterable[asyncio.Future[Any]]) -> None:
    """asyncio signal handler that cancels all `tasks` and reports to stderr."""
    err("Aborted!")
    for task in tasks:
        task.cancel()


def shutdown(loop: asyncio.AbstractEventLoop) -> None: