Hello.
I've ported another Tuna/Tuned dependency to Python 3 compatible form -
python-schedutils. I've tested it in epel 6 and fedora 28 mock and
everything looks good to me.
Github repository with python3 branch is here:
https://github.com/frenzymadness/python-schedutils/tree/python3
Successful COPR build compatible with epel 6 and epel 7 is here:
https://copr.fedorainfracloud.org/coprs/g/realtime/testing/build/660503/
Let me know if I can provide something more.
Have a nice day.
Lumír