title: python library and example for gmail smtp using oauth2
body: <p>The <a href="https://github.com/simplegeo/python-oauth2" rel="nofollow">python oauth2 library</a> seems to implement oauth 1.0 protocol.
  The <code>import oauth2 as oauth</code> is misleading, most probably it is referred to the 2nd version of the python lib implementing oauth 1.0.</p>
  
  <p>Is there any python library implementing the oauth 2.0 protocol?
  and also sample for using it. </p>
  
  <p>i tried google but failed to find any.</p>