def __init__(self, *args, **kwargs):
        if 'group' not in kwargs:
            self.group = kwargs.pop('group')
            self.link = '/{0}'.format(group)
            self.title = CONFIG.config(group)['title']
        else:
            self.group = ''
            self.link = '/'
        super(RoomFeed, self).__init__(*args, **kwargs)
dataset/ETHPy150Open timvideos/streaming-system/website/frontend/feeds.py/RoomFeed.__init__/operator `in` -> `not in`