Beazley

Python Cookbook, Third edition, Beazley D., Jones B., 2013.

   If you need help writing programs in Python 3, or want to update older Python 2 code, this book is just the ticket. Packed with practical recipes written and tested with Python 3.3, this unique cookbook is for experienced Python programmers who want to focus on modern tools and idioms.
Inside, you’ll find complete recipes for more than a dozen topics, covering the core Python language as well as tasks common to a wide variety of application domains. Each recipe contains code samples you can use in your projects right away, along with a discussion about how and why the solution works.

Python Cookbook, Beazley D., Jones B.K., 2013.

Preface.

Since 2008, the Python world has been watching the slow evolution of Python 3. It was always known that the adoption of Python 3 would likely take a long time. In fact, even at the time of this writing (2013), most working Python programmers continue to use Python 2 in production. A lot has been made about the fact that Python 3 is not backward compatible with past versions. To be sure, backward compatibility is an issue for anyone with an existing code base. However, if you shift your view toward the future, you'll find that Python 3 offers much more than meets the eye.