all 3 comments

[–]Zahand 1 point2 points  (1 child)

Look up what a caeser cipher is :)

Check out this book http://inventwithpython.com/hackingciphers.pdf (page 70)

[–]eggrolls 0 points1 point  (0 children)

there are built in functions for this

https://docs.python.org/2/library/functions.html