Each edition before the third also incorporated Python changes too—the first two editions from 1999 and 2003 covered Pythons 2.0 and 2.2, and their 1996 Programming Python 1st Edition predecessor, from which my three later books were all derived, began the process with Python 1.3—but I’ve omitted these here because they are now ancient history (well, in computer field terms, at least).
See the first and second editions for more details, if you can manage to scare one up. While it’s impossible to predict the future, given how much has stood the test of time, it’s likely that the core ideas stressed in this book will likely apply to future Pythons as well.