This is PyQt4 tutorial. The tutorial is suited for beginners and intermediate programmers. After reading this tutorial, you will be able to program non trivial PyQt4 applications.
Table of contents
A unique e-book covering advanced features of the PyQt4 library: Advanced PyQt4 tutorial
The PySide tutorial is a tutorial for another Python binding to the Qt library. To refresh your knowledge of the Python language there is a Python tutorial on ZetCode. wxPython tutorial, PyGTK tutorial and Tkinter tutorial are tutorials for other popular Python GUI bindings.