Caesar Cipher Breaker | Python Fiddle

# Caesar Cipher

MAX_KEY_SIZE = 26

def get_mode():
    while True:
        print('Do you wish to encrypt, decrypt, or brute force a message?')
        mode = input().lower()
        if mode in 'encrypt e decrypt d brute b'.split():
            return mode
        else:
            print('Enter either "encrypt" or "e" or "decrypt" or "d" or "brute" or "b".')

def get_message():
    print('Enter your message:')
    return input()

def get_key():
    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):
            return key

def get_translated_message(mode, message, key):
    if mode[0] =='d':
        key = -key
    translated = ''

for symbol in message:
        if symbol.isalpha():
            num = ord(symbol)
            num += key

if symbol.isupper():
                if num > ord('Z'):
                    num -= 26
                elif num < ord('A'):
                    num += 26
            elif symbol.islower():
                if num > ord('z'):
                    num -= 26
                elif num < ord('a'):
                    num += 26

translated += chr(num)
        else:
            translated += symbol
    return translated

mode = get_mode()
message = get_message()
if mode[0] != 'b':
    key = get_key()

print('Your translated text is:')
if mode[0] != 'b':
    print(get_translated_message(mode, message, key))
else:
    for key in range(1, MAX_KEY_SIZE + 1):
        print(key, get_translated_message('decrypt', message, key))

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