类的私有属性 多态

#私有属性，对外进行隐藏
'''
class  Student:
    def __init__(self, name, score):
        self.__name = name
        self.__score = score

    def print_score(self):
        print("%s: %s"%(self.__name,self.__score))
'''
'''

class Student:
    def __init__(self, name, gender):
        self.__name = name
        self.__gender = gender

    def get_gender(self):
        return self.__gender

    def set_gender(self, gender):
        if gender in '男女':
            self.__gender = gender
        else:
            raise ValueError('bad gender')


if __name__ ==  '__main__':
    bart = Student('Bart Simpson', '男')
    bart._Student__gender = '女'  ###变更私有类方法
'''
'''
多态练习
'''
class Animal(object):
    def run(self):
        print('Animal is running...')

class Dog(Animal):

    def run(self):
        print('Dog is running...')

class Cat(Animal):

    def run(self):
        print('Cat is running...')

def run_twice(animal):
    animal.run()
    animal.run()

run_twice(Dog())
run_twice(Cat())

转载于:https://www.cnblogs.com/pslblog/p/10281289.html