heroku/heroku-buildpack-python — pull request #9 by dpaola2 (2011-11-29 02:28:44+00:00)
Title: Allow Django's DATABASES to contain OPTIONS and other settings

Instead of simply overwriting the entire DATABASES dictionary in settings.py, we use DATABASES.update(...) to allow backend-specific options in Django, as outlined here: https://docs.djangoproject.com/en/dev/ref/databases/