①设计一个学生类，该类中包含：学号、姓名、python成绩三个属性，分别实现加减乘除的运算符重载，用于引用学生对象名就可以对学生成绩进行加减乘除运算。 ②建立张三、李四两个对象，并利用构造函数传参对其属性信息初始化。 100001 张三 95 100002 李四 87 ③对象的print（）方法进行功能改写，提示设置 __str__功能，print对象时的输出如下显示： ④利用运算符重载，求两人的python成绩的总分和平均分并输出

①实现代码如下：

class Student:
    def __init__(self, num, name, score):
        self.num = num
        self.name = name
        self.score = score

    def __add__(self, other):
        return self.score + other.score

    def __sub__(self, other):
        return self.score - other.score

    def __mul__(self, other):
        return self.score * other.score

    def __truediv__(self, other):
        return self.score / other.score

    def __str__(self):
        return f"学号：{self.num}，姓名：{self.name}，成绩：{self.score}"

②代码如下：

stu1 = Student(100001, "张三", 95)
stu2 = Student(100002, "李四", 87)

③代码如下：

class Student:
    def __init__(self, num, name, score):
        self.num = num
        self.name = name
        self.score = score

    def __add__(self, other):
        return self.score + other.score

    def __sub__(self, other):
        return self.score - other.score

    def __mul__(self, other):
        return self.score * other.score

    def __truediv__(self, other):
        return self.score / other.score

    def __str__(self):
        return f"学号：{self.num}，姓名：{self.name}，成绩：{self.score}"

stu1 = Student(100001, "张三", 95)
stu2 = Student(100002, "李四", 87)

print(stu1)
print(stu2)

输出结果为：

学号：100001，姓名：张三，成绩：95
学号：100002，姓名：李四，成绩：87

④代码如下：

class Student:
    def __init__(self, num, name, score):
        self.num = num
        self.name = name
        self.score = score

    def __add__(self, other):
        return self.score + other.score

    def __sub__(self, other):
        return self.score - other.score

    def __mul__(self, other):
        return self.score * other.score

    def __truediv__(self, other):
        return self.score / other.score

    def __str__(self):
        return f"学号：{self.num}，姓名：{self.name}，成绩：{self.score}"

stu1 = Student(100001, "张三", 95)
stu2 = Student(100002, "李四", 87)

total_score = stu1 + stu2
average_score = total_score / 2

print(f"总分为：{total_score}，平均分为：{average_score}")

输出结果为：

总分为：182，平均分为：91.0