[Python-Dev] introducing __dir__?

[Guido van Rossum]

+1 here too. This could be added easily to Python 2.6.

--Guido

On 7/7/06, Nick Coghlan <ncoghlan at gmail.com> wrote:
> Fred L. Drake, Jr. wrote:
> > On Thursday 06 July 2006 13:22, tomer filiba wrote:
> >  > my suggestion is simple -- replace this mechanism with a __dir__ -
> >  > a special method that returns the list of attributes of the object.
> >  >
> >  > rationale:
> >  > * remove deprecated __methods__, etc.
> >  > * symmetry -- just like hex() calls __hex__, etc.
> >  > * __methods__ and __members__ are lists rather than callable
> >  > objects, which means they cannot be updated on-demand
> >
> > +1
>
> +1 here, too.
>
> It would also allow objects which override __getattribute__ and/or __getattr__
> to make dir() provide a sane answer (or raise an exception to indicate that a
> sane answer isn't possible). (This was something that actually came up when
> trying to implement a namespace object that *didn't* automatically fall back
> to its class namespace for Python level attribute access)
>
> For backwards compatibility, dir() could still fall back to the current
> mechanism if __dir__ isn't found.
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
> ---------------------------------------------------------------
>              http://www.boredomandlaziness.org
> _______________________________________________
> Python-Dev mailing list
> Python-Dev at python.org
> http://mail.python.org/mailman/listinfo/python-dev
> Unsubscribe: http://mail.python.org/mailman/options/python-dev/guido%40python.org
>


-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)