def post(self):
        self._write_error(410)
        return
        subscription_id = self.request.get('subscription_id')
        subscription = data.get_subscription_by_id(subscription_id)
        subscription.advance()
        self.redirect(subscription_id % '/feed-playback/subscription/%s')
dataset/ETHPy150Open mihaip/streamspigot/app/feedplayback/handlers.py/SubscriptionAdvanceHandler.post/swapped operands of `%`