[Import-SIG] Round 2 for "A ModuleSpec Type for the Import System"

[Eric Snow]

On Sat, Aug 24, 2013 at 5:50 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:

> On 16 August 2013 01:59, Nick Coghlan <ncoghlan at gmail.com> wrote:
> > It wouldn't be a custom namespace, just a single attribute to pass
> > data to the loader. It could be a dict, namespace, string, custom
> > object, anything. By default, it would be None.
> >
> > For example, zipimporter could use it to pass the zip archive name to
> > the loader directly, rather than needing to derive it from origin or
> > create a custom loader for each find operation.
>
> Having implemented the "exec" part of the C extension modifications
> (see http://mail.python.org/pipermail/python-dev/2013-August/128101.html),
> I'm more convinced than ever that ModuleSpec should have some kind of
> a subnamespace for storing arbitrary loader specific details.
> Providing such a storage location not only allows information to be
> passed from the finder to the loader, but also from the create step to
> the exec step in the loading process (the C extension loader would, of
> necessity, find the execution entry point while determining how to
> create the module. It makes sense to be able to store that somewhere
> on the spec object, rather than having to go searching through the
> exported symbols again in the execution step.


Okay, I'm sold.  For now I'm calling it "loading_info", but that name
sounds kind of lame.

FYI, I have an update of the PEP up.  I've posted it to this list so it may
show up in a day or two. <wink>

-eric
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