Bumping this thread.
Draft of the self contained change: https://fedoraproject.org/wiki/User:Cstratak/python3.6_c.utf-8_locale
Some of the sections are reworded from PEP 538 [0] as most (if not all) of the motivation section for upstream, also applies for Fedora.
[0] https://www.python.org/dev/peps/pep-0538/
Feedback will be greatly appreciated
Regards,