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Python属性描述符以及属性查找顺序
阅读量:651 次
发布时间:2019-03-15

本文共 567 字,大约阅读时间需要 1 分钟。

通过一张图,让读者理解在对象在查找一个属性的顺序过程

在这里插入图片描述

代码如下

class IntField:    def __get__(self, instance, owner):        pass    def __set__(self, instance, value):        self.value = value        pass    def __delete__(self, instance):        passclass NonIntField:    def __get__(self, instance, owner):        passclass User:    age = IntField(23)    age = NonIntField(23)    age = 20    def __init__(self, age):        self.age = age            def __getattr__(self, item):        passif __name__ == '__main__':    user = User(23)    print(user.age)

上面的代码未必真的能运行,是将所有的情况都列出来放在了一起,用于对比.


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