[Python-ideas] a simple namespace type

[Oscar Benjamin]

On 27 May 2012 20:35, Eric V. Smith <eric at trueblade.com> wrote:

> On 5/27/2012 3:31 PM, Calvin Spealman wrote:
> > On Sun, May 27, 2012 at 1:58 PM, T.B. <bauertomer at gmail.com> wrote:
> >> On 2012-05-27 19:08, Sven Marnach wrote:
> >>> Calvin Spealman schrieb am Sun, 27. May 2012, um 09:42:26 -0400:
> >>>> - record
> >>>> - flexobject
> >>>> - attrobject
> >>>> - attrdict
> >>>> - nameddict
> >>>> - namedobject
> >>>
> >>> Since the proposed type is basically an `object` allowing attributes,
> >>> another option would be `attrobject`.
> >>>
> >>> Adding an `__iter__()` method, as proposed earlier in this thread,
> >>> seems unnecessary; you can simply iterate over `vars(x)` for an
> >>> `attrobject` instance `x`.
>


What about an `__iter__()` method that works like `dict.items()`? Then you
can do a round trip with
    ns = attrobject(**d)
and
    d = dict(ns)
allowing you to quickly convert between attribute-based and item-based
access in either direction.



> >>>
> >>
> >> Is this whole class really necessary? As said before, this type is
> >> implemented numerous times:
> >> * empty class (included in the Python Tutorial) [1]
> >> * argparse.Namespace [2]
> >> * multiprocessing.managers.Namespace [3]
> >> * bunch (PyPI) that inherits from dict, instead of wrapping __dict__ [4]
> >> * many more...
> >
> > All of the re-implementations of essentially the same thing is exactly
> why a
> > standard version is constantly suggested.
> >
> > That said, it is so simple that it easily has many variants, because it
> is only
> > the base of the different ideas all these things implement.
>
> A test of the concept would be: could the uses of the similar classes in
> the standard library be replaced with the proposed new implementation?
>
> Eric.
>
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