code: def open(self):
          '''
          Open the channel for communication.
          '''
          args = Writer()
          args.write_shortstr('')
          self.send_frame(MethodFrame(self.channel_id, 20, 10, args))
          self.channel.add_synchronous_cb(self._recv_open_okf open(self):
          '''
          Open the channel for communication.
          '''
          args = Writer()
          args.write_shortstr('')
          self.send_frame(MethodFrame(self.channel_id, 20, 10, args))
          self.channel.add_synchronous_cb(self._recv_open_ok)
docs: Open the channel for communication.