pygtk boxes and buttons

I looked at http://www.pygtk.org/pygtk2tutorial/sec-DetailsOfBoxes.html today. It seems to make sence, but the example they use is very confusing, in how it creates multiple different things. I'm kind of understanding it, but not very well. Tommorow I may try to write a program of my own with this, without copy pasting. I'd need to look at it a bit more first though, so that would take a while.