...:def__init__(self, n, a, s=0): ...: super().__init__(n, a)#显式调用父类的初始化方法...: self.score = s#添加成绩属性...:print("Student类的__init__方法被调用") ...: ...:definfos(self): ...: super().infos()#调用父类的方法...:print("成绩:", self.score) ...