Feature request: String-inferred names

Lie Ryan lie.1296 at gmail.com
Mon Nov 30 19:07:36 CET 2009


On 12/1/2009 3:35 AM, Bruno Desthuilliers wrote:
> Lie Ryan a écrit :
>> On 11/28/2009 3:08 PM, The Music Guy wrote:
>
> (snip the part about the proposed feature - which I don't like but
> that's not the point)
>
>>> My
>>> projects rely on a lot of metaclassing for the automatic generation of
>>> properties and methods, which saves tremendous amounts of coding.
>>
>> If you use it a lot, it is likely 1) you have abused class syntax for
>> what should have been a dict or 2) what you need is to override
>> __getattr__/__getattribute__ and __setattr__
>
> I have to totally disagree here. The way the OP uses metaprogramming is
> a really common and handy solution in lots of frameworks, and
> drastically reduces the need for boilerplate (and the potential for
> bugs). It's *WAY* cleaner (readability, introspection, doc etc) and far
> less error-prone than going the __getattr(ibute)__ / __setattr__, and
> also way more efficient (from execution time POV).

I won't argue with the usefulness of metaclass, I agree that metaclass 
is the cleanest way to implement certain things; but the main point is 
the OP's use of getattr/setattr while he got full control of the 
namespace dictionary.

> Using __getattr__ and __setattr__ to emulate attributes (usually
> descriptors) that can be built at class creation time is IMHO what
> should be labeled as an "abuse" (at best).




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