gnome-tweak-tool
Traceback (most recent call last):
  File "/usr/bin/gnome-tweak-tool", line 75, in <module>
    from gtweak.mainwindow import MainWindow
  File "/usr/lib/python2.7/site-packages/gtweak/mainwindow.py", line 20, in <module>
    from gi.repository import Gtk
  File "/usr/lib64/python2.7/site-packages/gi/importer.py", line 76, in load_module
    dynamic_module._load()
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 224, in _load
    overrides_modules = __import__('gi.overrides', fromlist=[self._namespace])
  File "/usr/lib64/python2.7/site-packages/gi/overrides/Gtk.py", line 1419, in <module>
    raise RuntimeError("Gtk couldn't be initialized")
RuntimeError: Gtk couldn't be initialized