I need help with a program i am doing. it is a cryptography program. i am given a regular alphabet and a key. i need to use the user input and use the regular alphabet and use the corresponding letter in the key and that becomes the new letter. i have the basic code but need help with how to mainpulate the string to do the encryption/decryption. please help
here is my code so far:
""" crypto.py Implements a simple substitution cypher """ alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" key = "XPMGTDHLYONZBWEARKJUFSCIQV" def main(): keepGoing = True while keepGoing: response = menu() if response == "1": plain = raw_input("text to be encoded: ") print encode(plain) elif response == "2": coded = raw_input("code to be decyphered: ") print decode(coded) elif response == "0": print "Thanks for doing secret spy stuff with me." keepGoing = False else: print "I don't know what you want to do..."