The package of PyXmL need a reuquire-statemnent, which refer to the same python
version, which it was used to build the PyXML package:

I think a 

%Requires: python = %pyver

should work.

This should prevent users to install PyXML to a system, which has an other
version of pythen, then the version, on which PyXML was built.

This version mismatch will coused error messages about missing xml.utils when
cups will be started.

This kind of bugs was reported several time on bugzilla.redhat.com.

Best Regards:

Jochen Schmitt