#14698: django.utils.module_loading.module_has_submodule yields false positives
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Reporter: lrekucki | Owner: nobody
Status: new | Milestone:
Component: Uncategorized | Version: 1.2
Keywords: | Stage: Unreviewed
Has_patch: 0 |
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The way I found this is a bit crazy, so I'm not going to describe it all,
but the 2 important things are:
# I have some explicit relative imports.
# I wanted to make a template library named the same as the application
it contains.
This generally should work (tried on a fresh project), but failed with a
weird error in my project: "'currencies' is not a valid tag library:
ImportError raised loading company.templatetags.currencies: No module
named currencies". Of course there is no such module, because it's on
"currencies.templatags" application.
So after some debuging it turned out that module_has_submodule returns a
false positive. This is because it checks {{{ if name in sys.modules }}}.
To be honest, I didn't know about this, but it seems that Python sometimes
also stores import misses by puting a None in to that dictionary. See
[http://mail.python.org/pipermail/python-dev/2009-July/090780.html this
python-dev thread].
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Ticket URL: <http://code.djangoproject.com/ticket/14698>
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