python练习题-day25

class Person:
　　__key=123
    def __init__(self,username,password):
        self.username=username
        self.__password=password
    def __get_pwd(self):
        return self.__password
    def login(self):
         self.__get_pwd()
alex=Person("alex","alex3714")
print(alex._Person__password)
print(alex.get_pwd())