'''
class Person(object):

    def __init__(self, name, age):
        # self.name = name
        self.__name = name  # __name即私有属性,设置 _Person__name = ”yuan“
        self.age = age
        self._score = 100

    def get_name(self):
        print(self.__name)

    def __foo(self):  # _Person__foo
        print("foo")


class Teacher(Person):

    def bar(self):
        self.__foo()  # self._Teacher__foo


p1  =  Person("xi",22)
p1.get_name() #xi
p1.__foo() # foo
p1._Person__foo() # foo
p1.bar() # Teacher无__foo变量 (AttributeError: 'Person' object has no attribute 'bar')


t1 = Teacher("xi", 23)
t1.bar() # Teacher无__foo变量 (AttributeError: 'Teacher' object has no attribute '_Teacher__foo')
'''