'Remove a single item.
Arguments:
jid  -- JID of the item to remove.
node -- Optional extra identifying information.'

def del_item(self, jid, node=None):

    if ((jid, node) in self._items):
        for item_xml in self.findall(('{%s}item' % self.namespace)):
            item = (item_xml.attrib['jid'], item_xml.attrib.get('node', None))
            if (item == (jid, node)):
                self.xml.remove(item_xml)
                return True
    return False
