Coding Challenge

   I completed all the tests except for test 3. I believe there's an error in this test. 
The length of  the "singles" variable in test 2 should be equal to the length of the "single_sorted_orders" variable in test 3, (since all you are doing to the single_orders is ordering them by the priority).

   I also changed the "WSGI_APPLICATION" variable in settings.py. From "apps.wsgi.application" to "wsgi.application". I don't know if this had to do with the development environment.  I just used the Django
development server.

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Thanks,
Giovanni