Learn String Manipulation by Building a Cipher - Step 82

Python
1

Tell us what’s happening:

Hi! I can’t seem to get right the assignment, I don’t get where I should put the pass

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]
    

# User Editable Region

    return final_message
    
encryption = vigenere(text, custom_key)
print(encryption)
decryption = vigenere(encryption, custom_key, -1)
print(decryption)
encrypt(message,key) 
pass



# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 82

2

this is not a function declaration (look again at the example in the challenge).
And don’t forget to indent your function body.

3

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