Excerpt from [http://pegasus.rutgers.edu/~elflord/unix/siptute/ Programming With Sip]:
This is by no means an authoritative discussion about SIP. Rather, it is a chronicle of the adventures and misadventures of a bumbling newbie trying to learn to use a great tool with little documentation. Some references that are essential in conjunction to this include:
PyQt: an implementation of Python bindings for Qt. Reading the Sip files for these classes is instructive.
[http://www.controlvideo.de/sip/ Sip documentation]. This is by no means complete, but it is currently the best available
A Note About Versions
sip has changed from version to version. I'm using python 2.2 and sip 3.0pre7. Depending on the verion you're using, sip will behave a little differently. The most notable addition to the new version of sip is support for classes that are wrapped inside namespaces.