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Showing content from https://mail.python.org/pipermail/python-dev/2004-August/046648.html below:

Proposed Python api for testing whether a module exists

[Python-Dev] Re: Proposed Python api for testing whether a module existsPaul Moore pf_moore at yahoo.co.uk
Mon Aug 2 21:35:18 CEST 2004
Jim Fulton <jim at zope.com> writes:

> Phillip J. Eby wrote:
>> At 12:32 PM 8/2/04 -0400, Jim Fulton wrote:
>>
>>> I propose to add the following function to the imp module:
>
> ...
>
>> Is this intended to work in the presence of import hooks?  In
>> particular, all the hooks offered by PEP 302, but also systems like
>> 'iu', 'imputil', etc.
>> Or, more specifically, will this be implemented in terms of the PEP
>> 302 importer/loader protocols, or will those protocols need
>> extending in order to allow such loaders (e.g. zipimport) to work
>> with this new function?
>
> Paul Moore wrote:
> ...
>  > Does this work in the presence of PEP 302 style import hooks?
>  > Specifically, the case where there's a zipfile on sys.path.
>
> Good question. I was planning to implement this in terms of
> imp.find_module, but that won't work in light of PEP 302.  Dang.
> It's too bad that the imp.get_loader proposed in PEP 302 isn't
> implemented.
>
> Paul, do you have an implementation of what would have been
> imp.get_loader?

Sorry, no. Just did the implementation, I mainly did some of the
write-up, testing, and cheerleading.

Paul.
-- 
Ooh, how Gothic. Barring the milk.

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