Django is a web development platform written in Python. Now there is a
book about it, published but also released online under the GFDL:
On Amazon it's called "The Definitive Guide to Django: Web Development
Done Right" and costs $30.
The website you read it on seems pretty sweet. Yay for links. It seems
like there is a good amount of code examples, but no screenshots that
I could spot (in a quick glance around).
They've just been waiting in a mountain for the right moment: