Python中私有变量和私有方法芳
Python中要想定义的方法或者变量只能在类内部使用不被外部使用，可以在方法和变量前面加两个下划线，让其变为私有方法或私有变量。类外部可以通过 ”_类名__私有属性（方法）名“ 访问私有属性（方法）。
class Person:
__work = 'teacher'
def __init__(self,name,age):
self.name = name
self.__age = age
def run(self):
print(self.__age,self.__work)
def __eat(self):
print('1111')__work是私有类变量，类外是无法访问的
if __name__ == '__main__':
print(Person.__work)
Traceback (most recent call last): File "C:/Users/wangli/PycharmProjects/Test/test/test.py", line 20, in <module> print(Person.__work)AttributeError: type object 'Person' has no attribute '__work'__work是私有类变量，类外类实例对象是无法访问的
if __name__ == '__main__':
test1 = Person('王大力','22')
print(test1.__work)Traceback (most recent call last): File "C:/Users/wangli/PycharmProjects/Test/test/test.py", line 21, in <module> print(test1.__work)AttributeError: 'Person' object has no attribute '__work'__age是私有实例变量，类外类实例对象是无法访问的
if __name__ == '__main__':
test1 = Person('王大力','22')
print(test1.__age)Traceback (most recent call last): File "C:/Users/wangli/PycharmProjects/Test/test/test.py", line 21, in <module> print(test1.__age)AttributeError: 'Person' object has no attribute '__age'__work是私有类变量，__age是私有实例变量，类内是可以访问的
if __name__ == '__main__':
test1 = Person('王大力','22')
test1.run()22 teacher
Process finished with exit code 0__eat（）是私有方法，类外是无法访问的
if __name__ == '__main__':
test1 = Person('王大力','22')
print(test1.__eat())Traceback (most recent call last): File "C:/Users/wangli/PycharmProjects/Test/test/test.py", line 21, in <module> print(test1.__eat())AttributeError: 'Person' object has no attribute '__eat'__work是私有类变量，__age是私有实例变量，__eat（）是私有方法，类外部可以通过 ”_Person___私有属性（方法）名“ 访问私有属性（方法）
if __name__ == '__main__':
print(Person._Person__work)
test1 = Person('王大力','22')
print(test1._Person__work)
print(test1._Person__age)
test1._Person__eat()
teacherteacher221111
Process finished with exit code 0本文参与 腾讯云自媒体分享计划，分享自微信公众号。
原始发表：2022-04-20，如有侵权请联系 cloudcommunity@tencent.com 删除
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