Learn Python The Hard Way
by Zed A. Shaw
This is a very beginner book for people who want to learn to code. If you can already code then the book will probably drive you insane. It's intended for people who have no coding chops to build up their skills before starting a more detailed book.
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by Kevin Sheppard
Python is a widely used general purpose programming language, which happens to be well suited to Econometrics and other more general purpose data analysis tasks. These notes provide an introduction to Python for a beginning programmer.
by Steven F. Lott
This book is a complete presentation of the Python for professional programmers who need to learn the language. The author leads you from a tiny, easy to understand subset of statements to the entire Python language and all built-in data structures.
by Dave Kuhlman
This document is a syllabus for a first course in Python programming. It contains an introduction to the Python language, instruction in the important features of the language, and practical exercises in the use of those features.
by Jeffrey Elkner, at al.
The goal of this book is twofold: to teach you how to program in Python; and to teach you to think like a computer scientist. This way of thinking combines some of the best features of mathematics, engineering, and natural science.