For use with "Hacking Secret Cyphers with Python" by Al Sweigart book. All code credit goes to him. Al also has some other really great books such as "Invent With Python" and I highly recommend his works, as they are very helpful for beginner and intermmediate programmers alike.
Once, again, I attribute this repository's contents to Al Sweigart, and take no responsibility for further sharing and/or attribution.
Book available from Al Sweigart's website at: http://inventwithpython.com/hacking/chapters/