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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):
        '''
        Cleanly shutdown the router socket
        '''
        if self._closing:
            return
        log.info('MWorkerQueue under PID %s is closing', os.getpid())
        self._closing = True
        # pylint: disable=E0203
        if getattr(self, '_monitor', None) is not None:
            self._monitor.stop()
            self._monitor = None
        if getattr(self, '_w_monitor', None) is not None:
            self._w_monitor.stop()
            self._w_monitor = None
        if hasattr(self, 'clients') and self.clients.closed is False:
            self.clients.close()
        if hasattr(self, 'workers') and self.workers.closed is False:
            self.workers.close()
        if hasattr(self, 'stream'):
            self.stream.close()
        if hasattr(self, '_socket') and self._socket.closed is False:
            self._socket.close()
        if hasattr(self, 'context') and self.context.closed is False:
            self.context.term()