flask-oauth-jython import error

flask-oauth-jython

paolo@tk:~/devel/nicola/golap-project/project$ jython 
from Jython 2.7b3+ (default:2c45f75a5406, Aug 14 2014, 10:08:07) 
[Java HotSpot(TM) 64-Bit Server VM (Oracle Corporation)] on java1.7.0_55
Type "help", "copyright", "credits" or "license" for more information.

>>> from flask_oauthlib.client import OAuth
log4j:WARN No appenders could be found for logger (org.python.netty.util.internal.logging.InternalLoggerFactory).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/paolo/devel/nicola/golap-project/jython/Lib/site-packages/Flask_OAuthlib-0.6.0-py2.7.egg/flask_oauthlib/client.py", line 13, in <module>
    import oauthlib.oauth2
  File "/home/paolo/devel/nicola/golap-project/jython/Lib/site-packages/oauthlib-0.6.3-py2.7.egg/oauthlib/oauth2/__init__.py", line 11, in <module>
    from .rfc6749.clients import Client
  File "/home/paolo/devel/nicola/golap-project/jython/Lib/site-packages/oauthlib-0.6.3-py2.7.egg/oauthlib/oauth2/rfc6749/clients/__init__.py", line 11, in <module>
    from .base import *
ImportError: No module named base