class Animal(object):

? ? def __init__(self, name, age, localtion):

? ? ? ? self.__name = name

? ? ? ? self.__age = age

? ? ? ? self.__localtion = localtion

? ? def get_info(self):

? ? ? ? return 'name = {}, age = {}, localtion = {}'.format(self.__name, self.__age, self.__localtion)

? ? def change_info(self,name,age,location):

? ? ? ? self.__name = name

? ? ? ? self.__age = age

? ? ? ? self.__location = location

? ? ? ??

dog = Animal('wangwang', 1, 'GuangDong')

print(dog.get_info())

dog.change_info('wangcai',3,'Error')

print(dog.get_info())

標注為Error的為最后輸出錯誤的地方

結果仍為“GongDong”