Listing modules from all installed packages

[Carlos Nepomuceno]

print '\n'.join([re.findall("from '(.*)'",str(v))[0] for k,v in sys.modules.items() if str(v).find('from')>-1])


> Date: Sat, 8 Jun 2013 21:30:48 -0700
> Subject: Listing modules from all installed packages
> From: jphalip at gmail.com
> To: python-list at python.org
> 
> Hi,
> 
> I'm trying to write a function that programmatically obtains and returns the exact location of all first-level modules for all installed packages.
> 
> For example, if the packages named 'django' and 'django-debug-toolbar' are installed, I'd like this function to return something like:
> >>> installed_modules()
> /Users/my_user/.virtualenvs/my_venv/lib/python2.6/site-packages/django
> /Users/my_user/.virtualenvs/my_venv/src/debug_toolbar
> 
> That is, this function needs to consider all installed packages, including those that have been installed in "edit" mode (i.e. in the src/ folder). Note also that the main module for the 'django-debug-toolbar' is in fact named 'debug_toolbar'.
> 
> So far the closest I've been to retrieving the list of first-level modules is as follows:
> 
>     import os
>     import pkg_resources
>     import setuptools
> 
>     pkgs = set()
> 
>     for dist in pkg_resources.working_set:
>         if os.path.isdir(dist.location):
>             for pkg in setuptools.find_packages(dist.location):
>                 if '.' not in pkg:
>                     pkgs.add(pkg)
> 
> The idea is then to loop through that list of modules, import them and get their exact locations by fetching their __file__ attribute values.
> 
> However, this feels very hackish and I don't think it's actually quite correct either. I'm sure there must be a better way. If possible I'd also like to avoid having to use setuptools.
> 
> Do you have any tips on how to achieve this?
> 
> Many thanks!
> 
> Julien
> -- 
> http://mail.python.org/mailman/listinfo/python-list
 		 	   		  
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