Oauth2 was originally forked from Leah Culver and Andy Smith"s oauth.py code. Some of the tests come from a fork by Vic Fryzel, while a revamped Request class and more tests were merged in from Mark Paschal"s fork. A number of notable differences exist between this code and its forefathers: - 100% unit test coverage. - The DataStore object has been completely ripped out. While creating unit tests for the library I found several substantial bugs with the implementation and confirmed with Andy Smith that it was never fully baked. - Classes are no longer prefixed with OAuth. - The Request class now extends from dict. - The library is likely no longer compatible with Python 2.3. - The Client class works and extends from httplib2. It"s a thin wrapper that handles automatically signing any normal HTTP request you might wish to make.