I ran into the same issue while upgrading from bionic-queens to bionic-rocky.
As a workaround I ran update-alternatives to switch to the python3 version then purged python-oslo.privsep.
I ran into the same issue while upgrading from bionic-queens to bionic-rocky.
As a workaround I ran update-alternatives to switch to the python3 version then purged python- oslo.privsep.