Lớp WeeklyQuiz

class WeeklyQuiz(ndb.Model):
    description = ndb.StringProperty(indexed=False)
    start_date = ndb.DateTimeProperty()
    publish_date = ndb.DateTimeProperty(auto_now_add=True)
    limit_memory = ndb.IntegerProperty(default=100)
    limit_time = ndb.FloatProperty(default=60)
    test_case = ndb.StructuredProperty(WeeklyQuizTest, repeated=True)

    def get_top_player(self, limit):
        pass

    @classmethod
    def get_this_week_contest(cls):
        pass