Function maybe_use_uvloop

src/black/concurrency.py:30–47

If our environment has uvloop or winloop installed we use it otherwise a normal asyncio eventloop is called as fallback. This is called only from command-line entry points to avoid interfering with the parent process if Black is used as a library.

()

def maybe_use_uvloop() -> asyncio.AbstractEventLoop:
    """If our environment has uvloop or winloop installed we use it otherwise
    a normal asyncio eventloop is called as fallback.

    This is called only from command-line entry points to avoid
    interfering with the parent process if Black is used as a library.
    """
    try:
        if sys.platform != "win32":
            import uvloop

            return uvloop.new_event_loop()
        else:
            import winloop

            return winloop.new_event_loop()
    except ImportError:
        return asyncio.new_event_loop()


def cancel(tasks: Iterable[asyncio.Future[Any]]) -> None: