CentOS is just a rebranding of RHEL, which uses Fedora as upstream source. Basically when they start a new version of RHEL, they pick some Fedora version as a

CentOS is just a rebranding of RHEL, which uses Fedora as upstream source. Basically when they start a new version of RHEL, they pick some Fedora version as a starting point, freeze things and make everything enterprise ready. So, yes, this likely means some future version of RHEL (and thus derivatives like CentOS and Scientific Linux) will also make the "switch" over to python3. Considering the turnaround time for RHEL versions (and how Fedora is still slow on the uptake of python3), I wouldn't expect this to happen anytime soon though.