Good book(s) or tutorial(s) on the web to learn Python classes, and decorators

I am a python hobbyist looking for a book or tutorial on the web that would be particularly helpful for me to learn how to use classes and decorators in Python. I love the Lutz book, "Learning Python", but I found the introduction to classes difficult to follow. I need something a little more basic and preferably with a lot of examples. I'd appreciate any suggestions for a book or tutorial on the web that would be particularly helpful for me to learn how to use classes and decorators in Python.

Thanks, Marc Hankin