Some points you should note:
This book covers the new-style objects (introduced a long time ago in Python 2.2). Examples are valid for Python 2.5 and all the way to Python 3.x.
This book is not for absolute beginners. It is for people who already know Python (some Python at least), and want to know more.
You should be familiar with the different kinds of objects in Python and not be confused when you come across the term type where you expected class. You can read the first part of this series for background information - Python Types and Objects.