The file /usr/bin/tor-prompt from the python3-stem RPM has a /usr/bin/python2 shebang, so it won't work unless python2-stem is also installed. Please switch the shebang to use Python 3. If anything is unclear, or if you need any kind of assistance, you can ask on IRC (#fedora-python on Freenode), or reply here. We'll be happy to help investigating or fixing this issue!
python-stem-1.4.1b-10.fc23 has been submitted as an update to Fedora 23. https://bodhi.fedoraproject.org/updates/FEDORA-2016-8c8ddeb89a
python-stem-1.4.1b-10.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-8c8ddeb89a
This bug appears to have been reported against 'rawhide' during the Fedora 24 development cycle. Changing version to '24'. More information and reason for this action is here: https://fedoraproject.org/wiki/Fedora_Program_Management/HouseKeeping/Fedora24#Rawhide_Rebase
python-stem-1.4.1b-10.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.