As the title implies, this book is just a reference (covering
up to python version 2.0.) The text is understable and
provides a central repository of the same material
you can get from the official documentation in the web
(python.org) The first 140 pages are a tutorial covering
the essencials of the language with several samples (these
are too trivial in my opinion) following with about 240 pages
describing the Python module library (again, the examples
are trivial.) There are also some chapters related with
the "internals" of Python, but no one is really "deep".
Resuming, sadly I think this book (as many in these times)
can be easily substituted with the web with little effort.