Learn String Manipulation by Building a Cipher - Step 86

Python
1

Tell us what’s happening:

Can someone help me to pass this challenge please?

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]
    
    return final_message

# User Editable Region

def encrypt(message, key):
    return vigenere(message, key)
    
def decrypt(message, key):
    return vigenere(message, key, -1)
    
encryption = vigenere(text, custom_key)
print(encryption)
decryption = vigenere(encryption, custom_key,-1)
print(decryption)

# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 86

3

you just need to use the encrypt and the decrypt functions instead of the vigenere here:

encryption = vigenere(text, custom_key)
print(encryption)
decryption = vigenere(encryption, custom_key,-1)
print(decryption)
4

It is great that you solved the challenge, but instead of posting your full working solution, it is best to stay focused on answering the original poster’s question(s) and help guide them with hints and suggestions to solve their own issues with the challenge.

We are trying to cut back on the number of spoiler solutions found on the forum and instead focus on helping other campers with their questions and definitely not posting full working solutions.

6

I didn’t post the solution, why was my comment removed?

7

My mistake, it looked like you had written new code instead of quoting the OP code.

8

It is okay, but can you put it back?

9

Note that your comment was not removed. We can all see it right now.