本文介绍了从标准库向 Python 字典添加属性的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
我想知道是否可以向 Python 字典添加属性?
I was wondering if you could add an attribute to a Python dictionary?
class myclass():
def __init__():
self.mydict = {} # initialize a regular dict
self.mydict.newattribute = "A description of what this dictionary will hold"
>>> AttributeError: 'dict' object has no attribute 'newattribute'
setattr(self.mydict, "attribute", "A description of what this dictionary will hold"
>>> AttributeError: 'dict' object has no attribute 'newattribute'
有没有办法快速添加我的描述属性，而不必复制 dict 类和重载构造函数.我以为这很简单，但我想我错了.
Is there anyway to quickly add my description attribute without having to copy the dict class and overloading the constructor. I thought it would be simple, but I guess I was wrong.
推荐答案
直接派生自dict:
class MyDict(dict):
pass
MyDict 实例的行为类似于 dict，但可以具有自定义属性:
Instances of MyDict behave like a dict, but can have custom attributes:
>>> d = MyDict()
>>> d.my_attr = "whatever"
>>> d.my_attr
'whatever'
这篇关于从标准库向 Python 字典添加属性的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！
本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益，请联系我们，我们会在确认后第一时间进行删除！