Django-facebook is the only one I know of that will support the Graph API right now: https://github.com/tschellenbach/Django-facebook

For just the fundaments:

Facebook's own SDK: https://github.com/facebook/python-sdk/blob/master/examples/...

or

Requests: http://docs.python-requests.org/en/latest/index.html

If you need more providers, there's also Django SocialAuth, but I'm not sure if it's updated for Facebook's OAuth 2 stuff yet.