def enterabs(self, time, priority, action, argument=(), kwargs=_sentinel):
        """Enter a new event in the queue at an absolute time.

        Returns an ID for the event which can be used to remove it,
        if necessary.

        """
        if kwargs is _sentinel:
            kwargs = {}
        event = Event(time, priority, action, argument, kwargs)
        with self._lock:
            heapq.heappush(self._queue, event)
        return event
Enter a new event in the queue at an absolute time.

        Returns an ID for the event which can be used to remove it,
        if necessary.