http://www.sidefx.com/docs/houdini13.0/hom/cookbook/pyqt/part2/ This module helps you use PyQt in Houdini's GUI by running PyQt's event loop in a separate thread ...

I've written about Getting started with PyQt in one of my previous blog posts, and the post covers the basics of getting Qt Designer and PyQt in general up and running - check it out if you haven't ...