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Tue Jul 27 20:07:56 CEST 2004 · https://mail.python.org/pipermail/python-dev/2004-July/046448.html

Tim Peters wrote:
> [Tim]
> 
>>>Sure!  Jim wants to distinguish "absenceness" from "brokenness" for
>>>some reason.  It's not clear to my why
> 
> 
> [Jim]
> 
>>Because a broken module is something that should get fixed.
> 
> 
> Maybe I don't know what "broken" means to you then.  To me it means
> things like syntax errors, and module initialization code that raises
> runtime exceptions.  If I try to import a module with problems like
> those, I don't get ImportError,

Yup

...

> Is the only
> case you're concerned about of the "A imports B imports C, and B's
> attempt to import C raises an ImportError that's passed on to A"
> flavor? 

Yes

 > I have one nasty example of that on hand:  Python's site.py
> tries to import sitecustomize.py, but if the latter contains a bogus
> import then site.py suppresses the error, because it treats the
> ImportError as meaning "I guess sitecustomize.py doesn't exist --
> that's fine".  That one cost me an hour yesterday!  So I'm becoming a
> believer <wink>.

:)

Jim

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[Python-Dev] Fix import errors to have data