从标准库添加到Python字典属性 [英] Adding an attribute to a python dictionary from the standard library

问题描述

我想知道，如果你能在attibute添加到Python字典。

I was wondering if you could add an attibute 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'

反正是有迅速增加我的描述属性，而无需复制dict类和重载的构造函数。我认为这将是简单的，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.

谢谢，
Ĵ

推荐答案

刚刚从获得字典：

class MyDict(dict):
    pass

MyDict 的实例可以有自定义属性：

Instances of MyDict can have custom attributes:

>>> d = MyDict()
>>> d.my_attr = "whatever"
>>> d.my_attr
'whatever'

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