Just as Python 3 is about the future, this edition of the Python Cookbook represents a major change over past editions. First and foremost, this is meant to be a very forward looking book. All of the recipes have been written and tested with Python 3.3 without regard to past Python versions or the “old way” of doing things. In fact, many of the recipes will only work with Python 3.3 and above. Doing so may be a calculated risk,but the ultimate goal is to write a book of recipes based on the most modern tools andidioms possible. It is hoped that the recipes can serve as a guide for people writing new code in Python 3 or those who hope to modernize existing code.