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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 close(self):
 """Clear the connection pool and stop the monitor. Reconnect with open(). """

        if self._publish:
            self._events.put((self._listener.publish_server_closed,
                              (self._description.address, self._topology_id)))
        self._monitor.close()
        self._pool.reset()