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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def onAIOCompletion(self):
 """ Call when eventfd notified events are available. """

        event_count = self.eventfd.read()
        trace('eventfd reports %i events' % event_count)
        # Even though eventfd signaled activity, even though it may give us
        # some number of pending events, some events seem to have been already
        # processed (maybe during io_cancel call ?).
        # So do not trust eventfd value, and do not even trust that there must
        # be even one event to process.
        self._aio_context.getEvents(0)