code: def get_hostinfo(self,callb=None):
          
          response = self.req_with_resp(GetInfo, StateInfo,callb=callb )
          return None
docs: Convenience method to request the device info from the device
  
          This will request the information from the device and request that callb be executed
          when a response is received. The is no  default callback
  
          :param callb: Callable to be used when the response is received. If not set,
                        self.resp_set_label will be used.
          :type callb: callable
          :returns: None
          :rtype: None