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A possible reproducer environment would be:

# mkdir test
# yum install -y  --installroot=$PWD/test --releasever=/ pykde4 pygtk2
# chroot test

"""
# python -c 'help("modules")'

Please wait a moment while I gather a list of all available modules...

/usr/lib64/python2.7/site-packages/gobject/constants.py:24: Warning: g_boxed_type_register_static: assertion 'g_type_from_name (name) == 0' failed
  import gobject._gobject
/usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py:40: Warning: specified class size for type 'PyGtkGenericCellRenderer' is smaller than the parent type's 'GtkCellRenderer' class size
  from gtk import _gtk
/usr/lib64/python2.7/site-packages/gtk-2.0/gtk/__init__.py:40: Warning: g_type_get_qdata: assertion 'node != NULL' failed
  from gtk import _gtk
Segmentation fault
"""

Removing pykde4 resolves the problem, that is caused by gtk2 and gtk3
conflicts, that pykde4 triggers.

i cannot reproduce this issue with 7.6, will try to reproduce it with 7.6 today.
Thanks for your report.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2019:2104