python - cannot import name is_secure transport -

i tried reinstall , reinstall 3 times, tried pip3 install --upgrade well, no method tried didn't worked. when try import twython or python twitter, error message:

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> .api import api                        # noqa file "/home/user/document/project lib/python-twitter/twitter/api.py", line 29, in <module> requests_oauthlib import oauth1 file "/usr/local/lib/python3.4/dist-packages/requests_oauthlib/__init__.py", line 3, in <module> .oauth2_auth import oauth2 file "/usr/local/lib/python3.4/dist-packages/requests_oauthlib/oauth2_auth.py", line 3, in <module> oauthlib.oauth2 import is_secure_transport importerror: cannot import name 'is_secure_transport' 

ps: happens on python3, on python2x works fine.