Python 类的公有、私有成员

时间：2020-11-14 00:40:51 收藏：0 阅读：36

我们先上结论┗( ▔, ▔ )┛

结论

__xx__:这种系统属性或方法，还没想好怎么测试，我们就看看用户自定义的吧

variate	from module import *	类外	继承
xx ：公有变量	?	?	?
_xx ：单前置下划线	?	?	?
__xx：双前置下划线	?	?	?

from module import * 测试部分
a.py

name = "name"
_name = "_name"
__name = "__name"

test.py

from a import *

print(name)
# print(_name)      #NameError: name ‘_name‘ is not defined
# print(__name)      #NameError: name ‘__name‘ is not defined

类外测试部分

class Person(object):
    name = "name"
    _name = "_name"
    __name = "__name"

    def method(self):
        print("method()")

    def _method(self):
        print("_method()")

    def __method(self):
        print("__method()")


instance = Person()
print(instance.name)  # name
print(instance._name)  # _name
# print(instance.__name)         # AttributeError: ‘Person‘ object has no attribute ‘__nam
instance.method()  # method()
instance._method()  # _method()
# instance.__method()     # AttributeError: ‘Person‘ object has no attribute ‘__method‘

继承测试部分

class PersonChild(Person):
    pass


instance = PersonChild()
print(instance.name)  # name
print(instance._name)  # _name
# print(instance.__name)        # AttributeError: ‘PersonChild‘ object has no attribute ‘__name‘
instance.method()  # method()
instance._method()  # _method()
# instance.__method()     # AttributeError: ‘PersonChild‘ object has no attribute ‘__method‘

原文：https://www.cnblogs.com/adamr/p/13972017.html