Learn String Manipulation by Building a Cipher - Step 81

Tell us what’s happening:

what’s wrong now

``````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]

return final_message

/* User Editable Region */

def encrypt(message, key):
return vigenere(message, key)

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

encryption = encrypt(text, custom_key)
print(encryption)
decryption = decrypt(encryption, custom_key, -1)
print(decryption)

/* User Editable Region */

``````

User Agent is: `Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36`

Challenge Information:

Learn String Manipulation by Building a Cipher - Step 81

As the hint says

Your `encryption` variable should have the value of `encrypt(text, custom_key)` .

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I have written the same as recommended but still not passed.
encryption = encrypt(text, custom_key)
print(encryption)
decryption = decrypt(encryption, custom_key, -1)
print(decryption)

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Hello AK,

Look at your decrypt function, how many arguements does it take?

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Been through the same issue and was able to solve it. @AK23, try to change both variables to stay the same as the encryption.

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Thank you bro for your help

Thanks you helped me out again!

1 Like