cipherWheel.py

from string import ascii_lowercase

def encrypt(plain,offset):
    plainId = ord(plain)%97
    cipherId = (plainId+offset)%26
    cipher = chr(97+cipherId).upper()

    return cipher


def encryptString(plainString,offset):
    cipherString = ""
    for letter in plainString:
        cipherString = cipherString + encrypt(letter,offset)
    return cipherString


def decrypt(cipher,offset):
    cipher = cipher.lower()
    cipherId = ord(cipher)%97
    plainId = cipherId - offset
    if plainId < 0:
        plainId = 26 + plainId
    plain = chr(97+plainId)
    return plain

def decryptString(cipherString, offset):
    plainString = ""
    for letter in cipherString:
        plainString = plainString + decrypt(letter,offset)
    return plainString



def cipherWheelWithOffset(offset):
    wheel = []

    for letter in ascii_lowercase:
        wheel.append(letter + " -- " + encrypt(letter,offset))

    for pair in wheel:
        print pair