The sales numbers already show that the book was timely and relevant to a huge (> 10,000 so far) number of people.
The sales numbers already show that the book was timely and relevant to a huge (> 10,000 so far) number of people.
I can definitely see why some think that the title is misleading. The book clearly does not aim to survey the field of data analysis in Python. However, it does teach you everything you need to know to start doing data analysis in Python using one particular (good) tool chain.
As to the merits, per se, of having some third party write the book: I'm doubtful. I followed wesm's development through blog posts, twitter updates, etc. Writing pandas forced him to consider a lot aspects of dealing with data in python, both deep and practical. In the process, I'm confident he became one of the foremost experts in not only his own software but in the current state of Data Analysis in Python. Who better to write this book?