caesarCode_p3.py

# -*- coding: utf-8 -*-
import sys

alphabet 	= "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZÆØÅabcdefghijklmnopqrstuvwxyzæøå .,:;!?"

def encodeString(ab, sTE, sec):
	finalString = ""

	for x in sTE:
		pos = ab.find(x)
		nPos = pos + sec

		if nPos >= len(ab):
			nPos = nPos - len(ab)

		finalString = finalString + ab[nPos]

	return finalString

def decodeString(ab, sTE, sec):
	finalString = ""

	for x in sTE:
		pos 	= ab.find(x)
		nPos 	= pos - sec

		if nPos < 0:
			nPos = nPos + len(ab)

		finalString = finalString + ab[nPos]

	return finalString

def main():
	print( "Caesar code".center(80, "="))
	print("1. Encode your shit.")
	print("2. Decode yo shizzle.")
	inp = input(">")
	if inp == "1":
		sec = input("Enter secret number:\n\t")
		encString = input("Enter a string to encode:\n\t")
		print( "Your encoded string is %s" % encodeString(alphabet, encString, int(sec) ) )	
	elif inp == "2":
		sec = input("Enter secret number:\n\t")
		decString = input("Enter a string to decode:\n\t")
		print( "Your decoded string is %s" % decodeString(alphabet, decString, int(sec) ) )
	else:
		sys.exit()
	

if __name__ == "__main__":
	main()