Django: No module named 'app'

Question

Django barfs with ``` ImportError at /store/ No module named store ``` But right there is the debug message there is the setting ``` INSTALLED_APPS = ('django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.admin', 'django.contrib.admindocs', 'store') Environment: Request Method: GET Request URL: http://localhost:8000/ Django Version: 1.4.5 Python Version: 2.7.3 Installed Applications: ('django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.sites', 'django.contrib.messages', 'django.contrib.staticfiles', 'django.contrib.admin', 'django.contrib.admindocs', 'store') Installed Middleware: ('django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.…

Accepted Answer

If it were not for version control, I would have never found this. As it was, it took me almost an hour to track it down.

The mistake was in store/urls.py:

```
urlpatterns = patterns('store.views',
    url(r'^$', 'main'),
    url(r'^new_delivery_user/$', 'new_delivery_user'),
    ...
    url(r'^event_signal/$', 'store.views.event_signal'), # problem
)
```

I had moved the last URL from the project url.py to this app-specific one, which used the shorthand 'store.views' for prepending each of the views.

It should have appeared:

```
    url(r'^event_signal/$', 'event_signal'),
```

Django: No module named 'app'

Solution

Problem