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Groups > comp.lang.python > #21764

Re: avoid import short-circuiting

Date 2012-03-16 10:06 -0700
From Ethan Furman <ethan@stoneleaf.us>
Subject Re: avoid import short-circuiting
References <4F636F0D.3060006@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.727.1331917120.3037.python-list@python.org> (permalink)

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Andrea Crotti wrote:
> I started the following small project:
> 
> https://github.com/AndreaCrotti/import-tree
> 
> because I would like to find out what exactly depends on what at 
> run-time, using an import hook.
> 
> It works quite well for small examples but the main problem is that once 
> a module is imported
> it's added to sys.modules and then it doesn't go through the import hook 
> anymore.
> 
> I tried to mess around with sys.modules but it might not be a good idea, 
> and it leads to easy
> infinite loops.
> Is there a good way to achieve this?
> I guess I could do the loop detection myself, but that should not be too 
> hard..

I believe sys.modules is a dictionary; you might try replacing it with 
your own custom dictionary that does whatever when the keys are accessed.

~Ethan~

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Re: avoid import short-circuiting Ethan Furman <ethan@stoneleaf.us> - 2012-03-16 10:06 -0700

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