title: Google API Python - KeyError: _module
body: <p>I am trying to use the quickstart.py ( <a href="https://developers.google.com/gmail/api/quickstart/python" rel="noreferrer">https://developers.google.com/gmail/api/quickstart/python</a> ) as per Google's Gmail API using oauth2. I am getting the below error.</p>
  
  <pre><code>Traceback (most recent call last):
    File "quickstart.py", line 68, in &lt;module&gt;
      main()
    File "quickstart.py", line 54, in main
      credentials = get_credentials()
    File "quickstart.py", line 37, in get_credentials
      credentials = store.get()
    File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 407, in get
          return self.locked_get()
        File "/usr/local/lib/python2.7/dist-packages/oauth2client/file.py", line 54, in locked_get
          credentials = client.Credentials.new_from_json(content)
        File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 302, in new_from_json
          module_name = data['_module']
      KeyError: '_module'
  </code></pre>