类,多态
类与self
class Student:
def __init__(self, n, id):
self.name = n
self.id = id
self.__age = 18
def say_hello(self):
print(f'我是{self.name},今年{self.__age}岁')
def set_age(self, age):
if 12 < age < 20:
self.__age = age
else:
print('年龄输入错误')
# class MiShu:
# def say_hellow(self):
# print('二狗你好')
#
#
# if __name__ == '__main__':
# a = MiShu()
# a.say_hellow()
from student import Student
s1 = Student('张三', 123)
s2 = Student('李四', 123)
s1.set_age(18)
s2.set_age(17)
s1.say_hello()
s2.say_hello()
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