~ $ /usr/bin/invoker --type=e -n -s python /opt/khtsimpletext/__init__.py
invoker: Invoking execution: '/usr/bin/python'
~ $ Traceback (most recent call last):
  File "/opt/khtsimpletext/__init__.py", line 19, in <module>
    from PySide.QtOpenGL import QGLWidget
ImportError: No module named QtOpenGL