无法导入名称is_secure传输

Question

我试图重新安装并重新安装三次，我试图pip3安装--upgrade也没有，根本没有我试过的方法没有用。当我尝试导入twython或python twitter时，我收到以下错误消息：

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/user/Documents/Project Lib/python-twitter/twitter/__init__.py", line 56, in <module>
from .api import Api                        # noqa
File "/home/user/Document/Project Lib/python-twitter/twitter/api.py", line 29, in <module>
from requests_oauthlib import OAuth1
File "/usr/local/lib/python3.4/dist-packages/requests_oauthlib/__init__.py", line 3, in <module>
from .oauth2_auth import OAuth2
File "/usr/local/lib/python3.4/dist-packages/requests_oauthlib/oauth2_auth.py", line 3, in <module>
from oauthlib.oauth2 import is_secure_transport
ImportError: cannot import name 'is_secure_transport'

ps：这只发生在Python3上，在Python2x上一切正常。