django-lint
Django Lint is a static analysis tool that checks (or "lints") projects and applications that use the Django web development framework. It reports on common programming errors and bad code smells, including checking for nullable CharField field types, the use of brittle or deprecated Django features (such as auto_now_add) as well as the absence of recommended options in settings.py. It aims to encourage the development of high-quality re-usable Django applications.
http://chris-lamb.co.uk/projects/django-lint/
