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I'm rather new to Ubuntu and I'm trying to run update-manager on Ubuntu.13.10. I get:

jacopo@jacopo-laptop:~$ update-manager 
Traceback (most recent call last):
  File "/usr/bin/update-manager", line 28, in <module>
    from gi.repository import Gtk
  File "/usr/lib/python3/dist-packages/gi/__init__.py", line 27, in <module> from ._gi import _API
ImportError: No module named 'gi._gi'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 64, in apport_excepthook
    from apport.fileutils import likely_packaged, get_recent_crashes
  File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>
    from apport.report import Report
  File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>
import apport.fileutils
  File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>
    from apport.packaging_impl import impl as packaging
  File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 20, in <module>
import apt
File "/usr/lib/python3/dist-packages/apt/__init__.py", line 21, in <module>
import apt_pkg
ImportError: No module named 'apt_pkg'

Original exception was:
Traceback (most recent call last):
File "/usr/bin/update-manager", line 28, in <module>
from gi.repository import Gtk
File "/usr/lib/python3/dist-packages/gi/__init__.py", line 27, in <module>
from ._gi import _API
ImportError: No module named 'gi._gi'

As far as I have understood, this is a problem related to the fact that I should have python3.4 installed. I installed it in /usr/local/ lib, but I always get the same error. In this way I can't even upgrade to Ubuntu 14.04. Could someone help me? Thanks in advance!

Jacopo

2

If you're trying to upgrade 13.10 to 14.04, try following these instructions. If you're just trying to update your current system from the command line, open a terminal and type the following:

sudo apt-get update
sudo apt-get dist-upgrade
  • Thanks. I had already tried but it didn't work. I tried once more now, getting, after apt-get update, the warning W: Failed to fetch bzip2:/var/lib/apt/lists/partial/it.archive.ubuntu.com_ubuntu_dists_saucy-updates_main_source_Sources Hash Sum mismatch – user291925 Jun 9 '14 at 14:22
  • K - you have a problem with the update sources. I've seen several threads about how to fix that The following link seems to be a good match for your question askubuntu.com/questions/41605/… – Charles Green Jun 9 '14 at 14:28
  • Thanks! I tried, but I still get the same error when running update-manager – user291925 Jun 9 '14 at 15:12
  • K - that about exhausts my possibilities with out a more extensive web search. Good luck! – Charles Green Jun 9 '14 at 15:22
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This may help:

I first uninstalled apt_pkg using:

sudo apt-get remove python3-apt

and then reinstalled the package using:

sudo apt-get install python3-apt

The error is primarily because of library apt_pkg.cpython-35m-x86_64-linux-gnu.so not being present in /usr/lib/python3/dist-packages.

Removing and reinstalling helps.

  • 1
    It's almost always preferable to reinstall the package in one step using sudo apt install --reinstall <package-name>, because this avoids calculating and removing dependencies (and marking packages for removal). Be aware that removing packages is not always a reversible procedure; for example APT will remove itself or its dependencies if asked to! The --reinstall flag is therefore much safer than remove followed by install. The remove command by itself does not remove configuration files of a package so has no benefit over install --reinstall. – Zanna Aug 8 '18 at 7:58
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I have managed to solve this by copying apt_pkg.cpython-34m-i386-linux-gnu.so to /usr/lib/python3/dist-packages/ from another desktop running Ubuntu 14.04 LTS. I have tried almost all possibilities found over internet like, purging python installation and then reinstalling, cleaning broken upgrade files etc, but ended up with no success.

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Just in case it helps another, I finally solved this problem, that was apparently caused by python version conflicts, by redirecting the link python3, then redirecting it to the right python version:

sudo rm /usr/bin/python3
sudo ln -s /usr/bin/python3.4

You may need to enter the correct python version, found with

python3 -V
  • So you removed one version for 3.4 ? – ThePassenger Jul 20 '18 at 13:49

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