PyQt on the Mac
From Wildsong
PyQt is a set of bindings for Python that allow you to build applications using the QT framework. So, in theory you can build one application that runs on any platform that supports Python and QT. This includes Macintosh, Linux, and Windows.
There is no binary installer for Macintosh.
First you have to build and install SIP. SIP is a tool for creating C/C++ bindings.
Then you have to build and install PyQT.
Sources for both are at Riverbank