Function future_discard_from_awaited_by

Lib/asyncio/futures.py:456–465

Record that `fut` is no longer awaited on by `waiter`.

(fut, waiter, /)

def future_discard_from_awaited_by(fut, waiter, /):
    """Record that `fut` is no longer awaited on by `waiter`."""
    # See the comment in "future_add_to_awaited_by()" body for
    # details on implementation.
    #
    # Note that there's an accelerated version of this function
    # shadowing this implementation later in this file.
    if isinstance(fut, _PyFuture) and isinstance(waiter, _PyFuture):
        if fut._Future__asyncio_awaited_by is not None:
            fut._Future__asyncio_awaited_by.discard(waiter)


_py_future_add_to_awaited_by = future_add_to_awaited_by