<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def zmq_device(self):
        '''
        Multiprocessing target for the zmq queue device
        '''
        self.__setup_signals()
        salt.utils.process.appendproctitle('MWorkerQueue')
        self.context = zmq.Context(self.opts['worker_threads'])
        # Prepare the zeromq sockets
        self.uri = 'tcp://{interface}:{ret_port}'.format(**self.opts)
        self.clients = self.context.socket(zmq.ROUTER)
        if self.opts['ipv6'] is True and hasattr(zmq, 'IPV4ONLY'):
            # IPv6 sockets work for both IPv6 and IPv4 addresses
            self.clients.setsockopt(zmq.IPV4ONLY, 0)
        self.clients.setsockopt(zmq.BACKLOG, self.opts.get('zmq_backlog', 1000))
        self._start_zmq_monitor()
        self.workers = self.context.socket(zmq.DEALER)

        if self.opts.get('ipc_mode', '') == 'tcp':
            self.w_uri = 'tcp://127.0.0.1:{0}'.format(
                self.opts.get('tcp_master_workers', 4515)
                )
        else:
            self.w_uri = 'ipc://{0}'.format(
                os.path.join(self.opts['sock_dir'], 'workers.ipc')
                )

        log.info('Setting up the master communication server')
        self.clients.bind(self.uri)
        self.workers.bind(self.w_uri)

        while True:
            if self.clients.closed or self.workers.closed:
                break
            try:
                zmq.device(zmq.QUEUE, self.clients, self.workers)
            except zmq.ZMQError as exc:
                if exc.errno == errno.EINTR:
                    continue
                raise exc
            except (KeyboardInterrupt, SystemExit):
                break