The following packages have unmet dependencies:
 libpython2.7-dev : Depends: libpython2.7-stdlib (= 2.7.6-8) but 2.7.6-8ubuntu0.2 is to be installed
                    Depends: libpython2.7 (= 2.7.6-8) but 2.7.6-8ubuntu0.2 is to be installed
E: Unable to correct problems, you have held broken packages.