upload_video.py示例代码

Question

我按照ubuntu 14.04中https://developers.google.com/youtube/v3/guides/uploading_a_video的描述运行了此示例代码，并收到以下错误消息：

Traceback (most recent call last):
    File "upload_video.py", line 178, in <module>
        youtube = get_authenticated_service(args)
    File "upload_video.py", line 82, in get_authenticated_service
        credentials = storage.get()
    File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 389, in get
        return self.locked_get()
    File "/usr/local/lib/python2.7/dist-packages/oauth2client/file.py", line 81, in locked_get
        credentials = Credentials.new_from_json(content)
    File "/usr/local/lib/python2.7/dist-packages/oauth2client/client.py", line 294, in new_from_json
        module_name = data['_module']
KeyError: '_module'

这个问题是由于缺少包裹还是其他原因造成的？