Method add_cancelled

Lib/concurrent/futures/_base.py:101–103

(self, future)

        self.event.set()

    def add_cancelled(self, future):
        super().add_cancelled(future)
        self.event.set()

class _AllCompletedWaiter(_Waiter):
    """Used by wait(return_when=FIRST_EXCEPTION and ALL_COMPLETED)."""