Before you start reading this book, you should know the basics of Python programming, such as the basic syntax, variable type, data type tuple, list dictionary, functions, strings, and methods. Two versions, 3.4 and 2.7.8, are available at python.org/downloads/.
In this book, all experiments and demonstrations have been done in Python version 2.7.8. If you use Linux OSes such as Kali or BackTrack, then there will be no issue, because many programs, such as wireless sniffing, do not work on the Windows platform. Kali Linux also uses the 2.7 version. If you love to work on Red Hat or CentOS, then this version is suitable for you.
Most hackers choose this profession because they don't want to do programming. They want to use tools. However, without programming, a hacker cannot enhance his/her skills. Each and every time, they have to search for the tools over the internet. Believe me, after seeing its simplicity, you will love this language.