[mattupstate]

While this might be decent advice around the internal details of a Django application's settings, what's missing is a mention of who this approach is designed for. It appears geared for developers who work on the project because the internal details (module names like settings.local, settings.production) leak to the command line interface. This might be fine in some cases, but this advice is not universal. All apps have a configuration API and you might consider how that looks depending on who/what is running the application, even if it's people who work on the code.