'Remove all items from a node.'

def purge(self, jid, node, ifrom=None, block=True, callback=None, timeout=None):

    iq = self.xmpp.Iq(sto=jid, sfrom=ifrom, stype='set')
    iq['pubsub_owner']['purge']['node'] = node
    return iq.send(block=block, callback=callback, timeout=timeout)
