"A Byte of Python" is a free book on programming using the Python language. It serves as a tutorial or guide to the Python language for a beginner audience. If all you know about computers is how to save text files, then this is the book for you.
In Dec 2008, the book was updated for the Python 3.0 release (one of the first books to do so). But now, I have converted the book back for Python 2 language because readers would often get confused between the default Python 2 installed on their systems vs. Python 3 which they had to separately install and all the tooling, esp. editors would assume Python 2 as well. I had a hard time justifying why I had to aggravate readers and make them go through all this when the fact is that they can learn either one and it would be just as useful. So, Python 2 it is.