[Python-ideas] Computed attribute names (Re: Assignment decorators)

[Steven D'Aprano]

Greg Ewing wrote:
> MRAB wrote:
> 
>> Or:
>>     x = a.(name)
> 
> That's what I'd go for as well, if I were to go for
> something like this at all.
> 
> FWIW, there is one thing you could do with this that
> is currently rather painful:
> 
>    x.(name) += 1
> 
> Doing that with getattr/setattr currently requires
> about 3 lines of code.

Is there a global newline shortage I haven't heard about? *wink*

In any case:

setattr(x, name, getattr(x, name, 0)+1)

looks like one line to me. If you don't like the DRY violation, the 
obvious helper function makes it easy to write that as (say)

incattr(x, name, 1)


-- 
Steven