code: def master_pub(self):
          '''
          Return the master publish port
          '''
          return _get_master_uri(self.opts['master_ip'],
                                 self.publish_port,
                                 source_ip=self.opts.get('source_ip'),
                                 source_port=self.opts.get('source_publish_port')f master_pub(self):
          '''
          Return the master publish port
          '''
          return _get_master_uri(self.opts['master_ip'],
                                 self.publish_port,
                                 source_ip=self.opts.get('source_ip'),
                                 source_port=self.opts.get('source_publish_port'))
docs: Return the master publish port