class Student:
    grade = "高三"  # 类属性
    def __init__(self, name, age):
        self.name = name
        self.age = age
    def get_info(self):
        return f"{self.grade}的{self.name}今年{self.age}岁"

s1 = Student("张三", 18)
s1.grade = "高二"
s2 = Student("李四", 17)
print(s1.get_info(), s2.get_info())