Learn String Manipulation by Building a Cipher - Step 81

Tell us what’s happening:

what’s wrong now

Your code so far

text = 'Hello Zaira!'
custom_key = 'python'

def vigenere(message, key, direction=1):
    key_index = 0
    alphabet = 'abcdefghijklmnopqrstuvwxyz'
    final_message = ''

    for char in message.lower():

        # Append any non-letter character to the message
        if not char.isalpha():
            final_message += char
        else:        
            # Find the right key character to encode/decode
            key_char = key[key_index % len(key)]
            key_index += 1

            # Define the offset and the encrypted/decrypted letter
            offset = alphabet.index(key_char)
            index = alphabet.find(char)
            new_index = (index + offset*direction) % len(alphabet)
            final_message += alphabet[new_index]
    
    return final_message

/* User Editable Region */

def encrypt(message, key):
    return vigenere(message, key)
    
def decrypt(message, key):
    return vigenere(message, key, -1)
    
encryption = encrypt(text, custom_key)
print(encryption)
decryption = decrypt(encryption, custom_key, -1)
print(decryption)

/* User Editable Region */

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 81

As the hint says

Your encryption variable should have the value of encrypt(text, custom_key) .

1 Like

thanks for your reply.
I have written the same as recommended but still not passed.
encryption = encrypt(text, custom_key)
print(encryption)
decryption = decrypt(encryption, custom_key, -1)
print(decryption)

1 Like

Hello AK,

Look at your decrypt function, how many arguements does it take?

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Been through the same issue and was able to solve it. @AK23, try to change both variables to stay the same as the encryption.

1 Like

Thank you bro for your help

Thanks you helped me out again!

1 Like