访问http://www.v2ex.com/twitter 碰到异常

是不是因为我没有在setting 中设置twitter 帐号?
看到以下异常信息:

Traceback (most recent call last):
File "/base/python_runtime/python_lib/versions/1/google/appengine/ext/webapp/__init__.py", line 511, in __call__
handler.get(*groups)
File "/base/data/home/apps/v2ex/1.345911815543573714/t.py", line 172, in get
statuses = twitter.GetHomeTimeline(count = 50)
File "/base/data/home/apps/v2ex/1.345911815543573714/twitter/twitter.py", line 1453, in GetHomeTimeline
json = self._FetchUrl(url, parameters=parameters)
File "/base/data/home/apps/v2ex/1.345911815543573714/twitter/oauthtwitter.py", line 101, in _FetchUrl
url_data = opener.open(url).read()
File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 387, in open
response = meth(req, response)
File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 498, in http_response
'http', request, response, code, msg, hdrs)
File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 425, in error
return self._call_chain(*args)
File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 360, in _call_chain
result = func(*args)
File "/base/python_runtime/python_dist/lib/python2.5/urllib2.py", line 506, in http_error_default
raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 401: Unauthorized