Comment 5 for bug 1178245

The package python3-apt is not getting pulled in when installing ubuntu-release-upgrader-core:

# apt-get install ubuntu-release-upgrader-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  python3-distupgrade python3-update-manager
The following NEW packages will be installed:
  python3-distupgrade python3-update-manager ubuntu-release-upgrader-core
0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded.
Need to get 201 kB of archives.
After this operation, 1,229 kB of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://nl.archive.ubuntu.com/ubuntu/ raring-updates/main python3-update-manager all 1:0.186.2 [33.9 kB]
Get:2 http://nl.archive.ubuntu.com/ubuntu/ raring-updates/main python3-distupgrade all 1:0.192.13 [143 kB]
Get:3 http://nl.archive.ubuntu.com/ubuntu/ raring-updates/main ubuntu-release-upgrader-core all 1:0.192.13 [23.9 kB]
Fetched 201 kB in 0s (742 kB/s)
Selecting previously unselected package python3-update-manager.
(Reading database ... 42859 files and directories currently installed.)
Unpacking python3-update-manager (from .../python3-update-manager_1%3a0.186.2_all.deb) ...
Selecting previously unselected package python3-distupgrade.
Unpacking python3-distupgrade (from .../python3-distupgrade_1%3a0.192.13_all.deb) ...
Selecting previously unselected package ubuntu-release-upgrader-core.
Unpacking ubuntu-release-upgrader-core (from .../ubuntu-release-upgrader-core_1%3a0.192.13_all.deb) ...
Processing triggers for man-db ...
Setting up python3-update-manager (1:0.186.2) ...
Setting up python3-distupgrade (1:0.192.13) ...
Setting up ubuntu-release-upgrader-core (1:0.192.13) ...