gistfile1.py

def time_left(self):
    if self.completed:
        return 0
 
    start = int(time.mktime(self.starttime.timetuple()))
    now = int(time.mktime(datetime.datetime.now().timetuple()))
    time_left = start + (settings.ATTACK_DURATION * 60) - now
 
    if time_left > 0:
        return time_left
    else:
        return 0