def createNode(self, pubsub, node, configure=None):
        assert(self.xmlstream is not None)
        
        create = CreateNodeMessage(pubsub, self.jid.userhost(), node)
        
        if configure:
            create.pubsub.addChild(configure)
            
        log.msg("Creating node %s" % create.toXml())
         
        return self.xmlstream.send(create)
dataset/ETHPy150Open selfsk/nodeset.core/src/nodeset/core/pubsub/agent.py/XmppAgent.createNode/operator `!=` -> `is not`