[Python-Dev] Proposed Python api for testing whether a module exists

[Jim Fulton]

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?

Jim

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