From Fedora Project Wiki
Python Version Support
In Fedora we have multiple Python runtimes, one for each supported major Python release. At this point that's one for python2.x and one for python3.x. If a piece of software supports python3, it must be packaged for python3. If it supports python2 as well, it may be packaged for python2. If it supports only python2 then (obviously) it must not be packaged for python3.