Learn String Manipulation by Building a Cipher - Step 95

Python
1

Tell us what’s happening:

My print call is written out right but the output is wrong. The step won’t complete

Your code so far

text = 'mrttaqrhknsw ih puggrur'
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

def encrypt(message, key):
    return vigenere(message, key)
    
def decrypt(message, key):
    return vigenere(message, key, -1)

# User Editable Region

print(f'\nEncrypted text: {text}')
print(f'Key: {custom_key}')
decryption = decrypt(text, custom_key)
print(f'\nDecrypyted text: {decryption}\n')

# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 95

1 Like
2

Hi there and welcome to our community!

Check the print call carefully. It doesn’t exactly match the requirements, as you have a typo.

3

If you take this code to VS code it should absolutely work. Therefore, your code is correct. However something in your f-string is not matching what the FCC expects as input and therefore is not matching. As the comment above, I’d check the print call CAREFULLY. I hope I didn’t spoil much and I hope I helped. Happy coding!