Cipher(This is cool!)

import time

MAX_KEY_SIZE = 26

getMessage = input("Enter the coded message: ").lower()





def translation():
    key = 0
    while True:
        print('Enter the key number (1-%s)' % (MAX_KEY_SIZE))
        key = int(input())
        if (key >= 1 and key <= MAX_KEY_SIZE):
            print("calculation in progress...")
            time.sleep(3)

            while True:
                message = getMessage
                translated = ''
                for symbol in message:
                    if symbol.isalpha():
                        num = ord(symbol)
                        num += key
                        if symbol.islower():
                            if num > ord('z'):
                                num -= 26
                            elif num < ord('a'):
                                num += 26
                        translated += chr(num)
                    else:
                        translated += symbol


                return translated
        #return translated