code: def subscribe(self, jid, node=None, *,
                    subscription_jid=None,
                    config=None):
          
  
          subscription_jid = subscription_jid or self.client.local_jid.bare()
  
          iq = aioxmpp.stanza.IQ(to=jid, type_=aioxmpp.structs.IQType.SET)
          iq.payload = pubsub_xso.Request(
              pubsub_xso.Subscribe(subscription_jid, node=node)
          )
  
          if config is not None:
              iq.payload.options = pubsub_xso.Options(
                  subscription_jid,
                  node=node
              )
              iq.payload.options.data = config
  
          response = yield from self.client.send(iq)
          return response
docs: Subscribe to a node.
  
          :param jid: Address of the PubSub service.
          :type jid: :class:`aioxmpp.JID`
          :param node: Name of the PubSub node to subscribe to.
          :type node: :class:`str`
          :param subscription_jid: The address to subscribe to the service.
          :type subscription_jid: :class:`aioxmpp.JID`
          :param config: Optional configuration of the subscription
          :type config: :class:`~.forms.Data`
          :raises aioxmpp.errors.XMPPError: as returned by the service
          :return: The response from the server.
          :rtype: :class:`.xso.Request`
  
          By default, the subscription request will be for the bare JID of the
          client. It can be specified explicitly using the `subscription_jid`
          argument.
  
          If the service requires it or if it makes sense for other reasons, the
          subscription configuration :class:`~.forms.Data` form can be passed
          using the `config` argument.
  
          On success, the whole :class:`.xso.Request` object returned by the
          server is returned. It contains a :class:`.xso.Subscription`
          :attr:`~.xso.Request.payload` which has information on the nature of
          the subscription (it may be ``"pending"`` or ``"unconfigured"``) and
          the :attr:`~.xso.Subscription.subid` which may be required for other
          operations.
  
          On failure, the corresponding :class:`~.errors.XMPPError` is raised.