Ubuntu – How to remove Python 3.6 from Ubuntu

Martin v. Löwis answered this here:

"You need to remove all files manually, and also undo any other stuff that installation did manually.

If you don't know the list of all files, you can reinstall it with the --record option, and take a look at the list this produces."

examples:

python setup.py install --record files.txt to generate the list

cat files.txt | xargs rm -rf to remove the files recorded by the previous step.

After reading the comments below the question I successfully reinstalled python3.6 and want to share with you how I did it.

1. I made a backup of all my data which I would recommend to everyone trying this. Although it worked for me it may fail for some reason on your machine and you don't want to lose your data.
2. I made sure that the deadsnakes PPA is deactivated.

3. I ran the following commands to remove the old version of python3.6 without removing all the dependencies and to directly install the default version.

   sudo dpkg --remove --force-depends python3.6 python3.6-minimal libpython3.6-minimal libpython3.6-stdlib
   sudo apt-get install python3.6 python3.6-minimal libpython3.6-minimal libpython3.6-stdlib
   

4. I ran sudo apt-get update and sudo apt-get upgrade before rebooting my machine.

Maybe this is overcomplicated but it worked for me. Thank you very much for your comments @wjandrea, @Ray, @Zanna.