Collating ancient greek

[snippsat]

Are those files, python files?
Would I make a blunder if I remove them ?
Should I uninstall unidecode and re-install it ?

Your installation is okay.
import unicode this is not a module,so it will just give error message.
You can try to update apt_pkg to avoid that message No module named 'apt_pkg'.

sudo apt-get install --reinstall python3-apt