When you don't import a module in Python

In Python import Sysprint Sys.path take a look at the reference path of the module, and then take a look at your module path is not here rpm-ql ...  If your module (package) does not exist, then add the export pythonpath= $PYTHONPATH on the last line of the/etc/profile: the path of your bag is complete, save the exit input  source/etc/ Profile then open the new terminal and see if the package line is directly import in Python.

When you don't import a module in Python