[PyMOL] installing pymol in redhat linux 8.0

[V. Chandran]

I have been trying to install pymol in red hat linux 8.0 using the redhat 
rpm package for this version. I am getting an error saying
"error: Failed dependencies:
 tkinter >= 2.0.0 is needed by pymol-0.97-1.rh80.py22"
How do I get tkinter 2.0.0?
Thanks,
Vidya.