I think this book is useless when you know R and m

When I read this book, I installed the software by this book said.

However, I did not recommend you to read this book when you know how to use R and matlab.

As we know, python is easy to study, and many libraries you can add to the area of data analysis. So, when you studying some algorithms related web mining or big data, I think you can do some projects to make you familiar with data analysis with python, rather than learning data analysis by this way.

However, if you new to python, I recommend this book for you, just know some computation in python, do not remember all of the syntax of these computation.

After all, this book is good enough to know python, however, you have known matlab or R, it is waster of time in this direction.

You know programming language is not problem, you should focus on the algorithms.