An empty object with dynamic attributes (expando)

[Steven D'Aprano]

On Thu, 03 Jun 2010 14:00:11 -0700, dmtr wrote:

> How can I create an empty object with dynamic attributes? It should be
> something like:
> 
>>>> m = object()
>>>> m.myattr = 1
> 
> But this doesn't work. And I have to resort to:
> 
>>>> class expando(object): pass
>>>> m = expando()
>>>> m.myattr = 1
> 
> Is there a one-liner that would do the thing?

Why does it have to be a one-liner? Is the Enter key on your keyboard 
broken?

You have a perfectly good solution: define a class, then instantiate it. 
But if you need a one-liner (perhaps to win a game of code golf), then 
this will work:

>>> m = type('', (), {})()
>>> m.attribute = 2
>>>



-- 
Steven