Learn String Manipulation by Building a Cipher - Step 69

Python
1

Tell us what’s happening:

Encryption and decryption are opposite processes and your function can do both with a couple of tweaks.

Add a third parameter called direction to your function definition. Also, comment out the last two lines of code to avoid errors in the console.

What’s wrong here?

Your code so far


# User Editable Region

text = 'Hello Zaira'
custom_key = 'python'

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

    for char in message.lower():
        # Append space to the message
        if char == ' ':
            encrypted_text += char
        else:        
            # Find the right key character to encode
            key_char = key[key_index % len(key)]
            key_index += 1
            # Define the offset and the encrypted letter
            offset = alphabet.index(key_char)
            index = alphabet.find(char)
            new_index = (index + offset) % len(alphabet)
            encrypted_text += alphabet[new_index]
    
    return encrypted_text

#encryption = vigenere(text, custom_key, direction)
#print(encryption)

# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 69

2

Hello @gisele_rotta
I can not identify anything wrong with it. However, it is possible that the validation test expects the comment #encryption = vigenere(text, custom_key, direction) to be without the direction parameter, since it would had not existed, previously.

3

yeah, it probably was that
thank you!

4

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