Learn String Manipulation by Building a Cipher - Step 91

Tell us what’s happening:

Describe your issue in detail here.

Hi team. I replaced all custome_key with happycoding. But the code does not pass.

Your code so far

/* User Editable Region */

text = 'mrttaqrhknsw ih puggrur'
happycoding = '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
            # 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)

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

/* User Editable Region */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36 Edg/

Challenge Information:

Learn String Manipulation by Building a Cipher - Step 91

You appear to have created this post without editing the template. Please edit your post to Tell us what’s happening in your own words.

custom_key is a variable which contains the key, which was python.
Change the key to happycoding

They key is what unscrambles a cipher and if you use the wrong key, it won’t unscramble properly.

If you see my code above, you will notice that I already replaced custom_key by happycoding.

you changed the name of the variable, you need to change the value of the variable

You should still have a custom_key variable.

1 Like