get-distro-upgrade.py needs to be converted to python3

[Serhiy]

The report appeared after upgrading from 13.04 to 13.10

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: packagekit-backend-aptcc 0.8.10-2ubuntu2
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: i386
Date: Thu Oct 31 02:52:59 2013
ExecutablePath: /usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py
InterpreterPath: /usr/bin/python2.7
MarkForUpload: True
ProcCmdline: python /usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py get-distro-upgrades
ProcEnviron: LANG=en_US.UTF-8
PythonArgs: ['/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py', 'get-distro-upgrades']
SourcePackage: packagekit
Title: get-distro-upgrade.py crashed with ImportError in __main__: No module named packagekit.backend
Traceback:
 Traceback (most recent call last):
   File "/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py", line 24, in <module>
     from packagekit.backend import *
 ImportError: No module named packagekit.backend
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Benedykt 'Silmethule' Jaworski (silmethule)]

Happens also on Kubuntu 13.10 for amd64.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

It looks like packagekit-backend-aptcc is called with python2.7 but the packagekit.backend code is python3.

[Brian Murray (brian-murray)]

This is occurring rather frequently:

https://errors.ubuntu.com/bucket/?id=/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py:ImportError:/usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py@24

[Craig Gowing (credativ) (craiggowing)]

I got this error pop up around 4 times every login on Kubuntu 13.10 amd64 (upgraded), and then at random intervals after that.

Oddly on my other Kubuntu 13.10 amd64 box (again upgraded) this module is available for python 2.7:
>>> import packagekit.backend
>>> packagekit.backend
<module 'packagekit.backend' from '/usr/lib/python2.7/dist-packages/packagekit/backend.pyc'>

The py files on my working box were in /usr/share/pyshared/packagekit and symlinked to /usr/lib/python2.7/dist-packages/packagekit.
They must have come from some old package that was removed during the upgrade but preserved the files I guess?

I tested out two possible workarounds and they both seemed to work:

1. Modify /usr/share/PackageKit/helpers/aptcc/get-distro-upgrade.py and change the first line to:
#!/usr/bin/env python3

2. Copy over /usr/share/pyshared/packagekit/ from my working box and symlink the py files to /usr/lib/python2.7/dist-packages/packagekit/

[Dimitri John Ledkov (xnox)]

Fixed committed as part of removing python2.7 from ubuntu touch images:

packagekit (0.8.12-1ubuntu3) trusty; urgency=medium

  * Change p-b-aptcc backend helper shebang from python2 to python3. (LP:
    #1283574)
 -- Dimitri John Ledkov <email address hidden> Mon, 24 Feb 2014 17:12:52 +0000

[Matthias Klumpp (ximion)]

I will apply this upstream as well... (I wonder why this hasn't been the case yet... Maybe because python-packagekit wasn't fully ported)