PyGIWarning

/usr/lib64/python3.4/importlib/_bootstrap.py:1471: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  _call_with_frames_removed(exec, code, module.__dict__)
Traceback (most recent call last):
  File "blobedit.py", line 16, in <module>
    from GUI import Application, ScrollableView, Document, Window, Cursor, rgb
  File "/usr/lib/python3.4/site-packages/GUI/__init__.py", line 74, in <module>
    from GUI.Colors import rgb
  File "/usr/lib/python3.4/site-packages/GUI/Colors.py", line 5, in <module>
    from gtk import Style
ImportError: cannot import name 'Style'