python_encription.py

alphabet="abcdefghijklmnopqrstuvwxyz"

def getLetter(index):
    return alphabet[index]

def getIndex(letter):
    return alphabet.find(letter)

def getEncryptedLetter(letter, key):
    letterIndex = getIndex(letter)
    if (letterIndex == -1):
        return letter

    newPosition = (letterIndex + key) % 26
    encryptedLetter = getLetter(newPosition)
    print(letter, " to ", encryptedLetter)
    return encryptedLetter


def encryptMessage(message, key):
    encryptedMessage = ""
    for letter in message:
        encryptedMessage = encryptedMessage + getEncryptedLetter(letter, key)
    return encryptedMessage


message = """
what did the t-rex use to build his house?
dino-saw
"""

print(encryptMessage(message, 6))