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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 stop(self, nowait=False):
 """Stop the listener. This asks the thread to terminate, and then waits for it to do so. Note that if you don't call this before your application exits, there may be some records still left on the queue, which won't be processed. If nowait is False then thread will handle remaining items in queue and stop. If nowait is True then thread will be stopped even if the queue still contains items. """

        self._stop.set()
        if nowait:
            self._stop_nowait.set()
        self.queue.put_nowait(self._sentinel_item)
        if (self._thread.isAlive() and
                self._thread is not threading.currentThread()):
            self._thread.join()
        self._thread = None