code: def issue_command(self, cmd, *args):
      
      self._writeline(cmd)
      self._writeline(str(len(args)))
      for arg in args:
        arg = str(arg)
        self._writeline(str(len(arg)))
        self._sock.sendall(arg.encode("utf-8"))
  
      return self._read_response()
docs: Sends and receives a message to/from the server