fix compatibility with python2.6
fix compatibility with python2.6

RouxRC/weboob,sputnick-dev/weboob,willprice/weboob,sputnick-dev/weboob,willprice/weboob,sputnick-dev/weboob,willprice/weboob,nojhan/weboob-devel,nojhan/weboob-devel,RouxRC/weboob,nojhan/weboob-devel,RouxRC/weboob