[Python-Dev] clarifying PEP 302 loader responsibilities upon failure

[bcannon at gmail.com]

Guido and I were discussing what a loader should be responsible for when  
load_module is called and an exception is raised in relation to sys.modules  
as PEP 302 says nothing about the topic.

We both agree that if the loader added a module to sys.modules it should be  
removed, otherwise it should be left alone.

Assuming no one disagrees I will update the PEP to specify that this is the  
expected job of loaders.

-Brett
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