> apt-get -o Dpkg::Options::="--force-depends" install python3
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 python3 : Depends: libpython3-stdlib (= 3.5.1-3) but 3.4.0-0ubuntu2 is to be installed
 python3-apt : Depends: libapt-inst2.0 (>= 1.1~exp9) but it is not going to be installed
               Depends: libapt-pkg5.0 (>= 1.1~exp9) but it is not going to be installed
 python3-gi : Depends: libgirepository-1.0-1 (>= 1.44.0) but 1.40.0-1ubuntu0.2 is to be installed
              Depends: libglib2.0-0 (>= 2.41.1) but 2.40.2-0ubuntu1 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).