Since March of this year, Google has supported OAuth 2.0 for many APIs, including Google Data APIs such as Google Calendar, Google Contacts and Google Documents List. Google's implementation of OAuth 2.0 introduces many advantages compared to OAuth 1.0 such as simplicity for developers and a more polished user experience.
Google have just added support for this authorization mechanism to the gdata-python-client library-- let’s take a look at how it works by retrieving an access token for the Google Calendar and Google Documents List APIs and listing protected data.
Getting Started