too early for D2 and too late for D1

[Andrej Mitrovic]

For what it's worth, the examples from Mark's book still compile with
Python 2.7 and the latest PyQt bindings. And PyQt itself comes with
examples that are stored in Python\lib\site-packages\pyqt4\examples\ .
I don't think a lot has changed that breaks backward-compatibility
since the book was published.

I don't really know what benefits you would have from Python 3.x, I
think 2.7 got some 3.x features backported to that version as well..