OAbot last made edits in October 2021 and I suspect it's because of some Python compatibility issue. Let's switch to Python3, there isn't that much to do: https://github.com/dissemin/oabot/pull/82
The only thing to replace is probably multiprocessing.
At the moment I can't test the changes on bastion (which is on python 2.7 or 3.5), because I can't recreate a virtual environment:
- with python2, pywikibot 3 fails to install;
- with python3, pywikibot installation complains about setuptools incompatibility in all versions I tried from 5 to 6.