Please try running source $ROOTSYS/bin/thisroot.sh, where ROOTSYS is the directory where ROOT is installed, and then try again to open Python and import ROOT.
I think that on Fedora/CentOS, an additional package is required for PyROOT support. I think that for Python-2.7, the package should be named python2-root. Therefore, you can try:
Could you confirm that you are running Python-2.7, i.e., $ python --version. EPEL provides different packages depending on the Python version. Also, could you confirm that after installing the package the directories cppyy, cppyy_backend, and ROOT can be found under /usr/lib64/python2.7/site-packages/?
Finally, could you copy here the specific error that you are getting when you try to import ROOT?