Learn String Manipulation by Building a Cipher - Step 57

Conte-nos o que está acontecendo:

Descreva detalhadamente o problema aqui.

Seu código até o momento


text = 'Hello Zaira'
custom_key = 'python'

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

    for char in message.lower():

# User Editable Region

        # Append space to the message
        if char == ' ':
            encrypted_text += char
        else:
            key_char += key[key_char % len(key)]
          

# User Editable Region

            index = alphabet.find(char)
            new_index = (index + offset) % len(alphabet)
            encrypted_text += alphabet[new_index]
    print('plain text:', message)
    print('encrypted text:', encrypted_text)

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Informações do desafio:

Learn String Manipulation by Building a Cipher - Step 57

what’s wrong with my code???

key_char doesn’t exist before that line, so you can’t use +=