code: def _process_iq_response(self, stanza):
          
          stanza_id = stanza.stanza_id
          from_jid = stanza.from_jid
          if from_jid:
              ufrom = from_jid.as_unicode()
          else:
              ufrom = None
          res_handler = err_handler = None
          try:
              res_handler, err_handler = self._iq_response_handlers.pop(
                                                      (stanza_id, ufrom))
          except KeyError:
              logger.debug("No response handler for id={0!r} from={1!r}"
                                                  .format(stanza_id, ufrom))
              logger.debug(" from_jid: {0!r} peer: {1!r}  me: {2!r}"
                                          .format(from_jid, self.peer, self.me))
              if ( (from_jid == self.peer or from_jid == self.me
                              or self.me and from_jid == self.me.bare()) ):
                  try:
                      logger.debug("  trying id={0!r} from=None"
                                                          .format(stanza_id))
                      res_handler, err_handler = \
                              self._iq_response_handlers.pop(
                                                      (stanza_id, None))
                  except KeyError:
                      pass
          if stanza.stanza_type == "result":
              if res_handler:
                  response = res_handler(stanza)
              else:
                  return False
          else:
              if err_handler:
                  response = err_handler(stanza)
              else:
                  return False
          self._process_handler_result(response)
          return True
docs: Process IQ stanza of type 'response' or 'error'.
  
          :Parameters:
              - `stanza`: the stanza received
          :Types:
              - `stanza`: `Iq`
  
          If a matching handler is available pass the stanza to it.  Otherwise
          ignore it if it is "error" or "result" stanza or return
          "feature-not-implemented" error if it is "get" or "set".