def _go_live(self):
        if self.status != 'live' and self.streamer and\
            self.streamer.checked and\
            (self.streamer.last_time_notified is None or
                (self.streamer.last_time_notified - datetime.utcnow()) > timedelta(hours=1)):
            self.streamer.need_to_notify_subscribers = True
        self.status = 'live'
dataset/ETHPy150Open WatchPeopleCode/WatchPeopleCode/wpc/models.py/Stream._go_live/swapped operands of `-`