No module named 'apt_pkg' - Printable Version

No module named 'apt_pkg' - Printable Version

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+-- Forum: Software - Support (https://www.freecinema2022.gq/forums/forumdisplay.php?fid=5)
+--- Forum: Updates (https://www.freecinema2022.gq/forums/forumdisplay.php?fid=46)
+--- Thread: No module named 'apt_pkg' (/showthread.php?tid=9018)

No module named 'apt_pkg' - starnekit - 01-01-2024

Hello! I've tried to update several times with "sudo apt update", but anytime I have the same error with apt_pkg
Does anyone knows what the problem it could be?

For extra info - I installed some freshly versions of Python, maybe it broke the update system?

Thank you very much!

Code:
===========================

Install Updates Error log

===========================

Install Updates could not fetch the package cache information lists.

Go to https://www.freecinema2022.gq/forums/ and paste the log below into the Software - Support - Updates section for assistance.

============ Log ===========

Сущ:1 https://repo.steampowered.com/steam stable InRelease

Сущ:2 http://security.ubuntu.com/ubuntu jammy-security InRelease

Сущ:3 http://packages.microsoft.com/repos/code stable InRelease

Сущ:4 http://archive.canonical.com/ubuntu jammy InRelease

Сущ:5 https://dl.google.com/linux/chrome/deb stable InRelease

Сущ:6 http://repo.linuxliteos.com/linuxlite fluorite InRelease

Сущ:7 https://ppa.launchpadcontent.net/deadsnakes/ppa/ubuntu jammy InRelease

Сущ:8 http://us.archive.ubuntu.com/ubuntu jammy InRelease

Сущ:9 http://us.archive.ubuntu.com/ubuntu jammy-updates InRelease

Сущ:10 http://us.archive.ubuntu.com/ubuntu jammy-backports InRelease

Traceback (most recent call last):

  File "/usr/lib/cnf-update-db", line 3, in <module>

    import apt_pkg

ModuleNotFoundError: No module named 'apt_pkg'

Чтение списков пакетов…

E: Problem executing scripts APT::Update::Post-Invoke-Success 'if /usr/bin/test -w /var/lib/command-not-found/ -a -e /usr/lib/cnf-update-db; then /usr/lib/cnf-update-db > /dev/null; fi'

E: Sub-process returned an error code

Re: No module named 'apt_pkg' - stevef - 01-02-2024

It is possible that changing the python version has caused many function scripts to stop working.

What do these commands indicate ?

Code:
inxi -S

Code:
python3 -V

Code:
ls -l /usr/bin/python*

Re: No module named 'apt_pkg' - starnekit - 01-02-2024

Thanks for the answer!

Those commands indicates:

Code:
inxi -S

System:

  Host: linux-laptop1 Kernel: 5.15.0-91-generic x86_64 bits: 64 

  Desktop: Xfce 4.16.0 Distro: Linux Lite 6.6 LTS

Code:
python3 -V

Python 3.11.7

Code:
ls -l /usr/bin/python*

lrwxrwxrwx 1 root root      24 дек 17 20:46 /usr/bin/python -> /etc/alternatives/python

lrwxrwxrwx 1 root root      25 дек 18 00:12 /usr/bin/python3 -> /etc/alternatives/python3

-rwxr-xr-x 1 root root 5904904 ноя 20 18:14 /usr/bin/python3.10

lrwxrwxrwx 1 root root      34 ноя 20 18:14 /usr/bin/python3.10-config -> x86_64-linux-gnu-python3.10-config

-rwxr-xr-x 1 root root 6714392 дек  8 21:56 /usr/bin/python3.11

lrwxrwxrwx 1 root root      17 дек 17 20:46 /usr/bin/python3-config -> python3.10-config

-rwxr-xr-x 1 root root     960 янв 25  2023 /usr/bin/python3-futurize

-rwxr-xr-x 1 root root     964 янв 25  2023 /usr/bin/python3-pasteurize

Re: No module named 'apt_pkg' - stevef - 01-02-2024

The required system default python for Linux Lite 6.6 is 3.10.

What instructions did you follow to install python 3.11 ?
If python 3.11 became system default during the install, is almost certainly the cause of the problem.

Re: No module named 'apt_pkg' - starnekit - 01-02-2024

Quote:What instructions did you follow to install python 3.11 ?

I searched in my browser history

Seems like I used this guide https://www.itsupportwale.com/blog/how-to-upgrade-to-python-3-11-on-ubuntu-20-04-and-22-04-lts/ which connected with using "deadsnakes" repo

I think it closely correlates with the problems people had in this thread https://stackoverflow.com/questions/13708180/python-dev-installation-error-importerror-no-module-named-apt-pkg

So as I understand I should move the apt_pkg into the never Python folder or maybe say Linux to use python 3.10 as the default again, right?

Re: No module named 'apt_pkg' - starnekit - 01-02-2024

Ok, I think I fixed it!

I used

Code:
sudo update-alternatives --config python3

than chose the 3.10 version and finally apt update works again!

I want to believe I used the right way

Re: No module named 'apt_pkg' - stevef - 01-03-2024

You can have different versions of python in parallel on your system, but if the system default is changed it is likely to cause problems.

The worrying bit in the instructions you linked to is

Quote:.... and configure it as the default version of Python in Ubuntu 20.04 and 22.04 LTS.

This should come with a warning really.
The comments under the instructions show that others also had problems after following the instructions.

Quote:I want to believe I used the right way

It was necessary to reverse whatever was done to change the system default - so step 4 of the instruction needed to be undone which you did.

Re: No module named 'apt_pkg' - starnekit - 01-03-2024

Thanks a lot for your help! Big Grin

Big Grin