Python Youtube数据API V3 UnicodeCode utf8

下面我将使用youtube数据Api V3检索youtube视频的评论。我已经有了“youtube-v3-discoverydocument.json”，但是当我运行它时，我得到了以下错误：

Traceback (most recent call last):
  File "test.py", line 187, in <module>
    youtube = get_authenticated_service(args)
  File "test.py", line 73, in get_authenticated_service
    return build_from_document(doc, http=credentials.authorize(httplib2.Http()))
  File "C:\Anaconda\lib\site-packages\oauth2client\util.py", line 140, in positional_wrapper
    return wrapped(*args, **kwargs)
  File "C:\Anaconda\lib\site-packages\googleapiclient\discovery.py", line 305,      in build_from_docu
    service = json.loads(service)
  File "C:\Anaconda\lib\json\__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "C:\Anaconda\lib\json\decoder.py", line 366, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Anaconda\lib\json\decoder.py", line 382, in raw_decode
    obj, end = self.scan_once(s, idx)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xe0 in position 39: invalid continuation byte

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但我不知道怎么回事，有什么建议吗

python3或python2看起来像一个unicode问题。Python 2.7.8 | Anaconda 2.1.0，thanksIs

youtube-v3-discoverydocument.json

肯定是utf-8编码的？

with open("youtube-v3-discoverydocument.json", "r") as f:    
    doc = f.read()
return build_from_document(doc, http=credentials.authorize(httplib2.Http()))