Learn String Manipulation by Building a Cipher - Step 69

Python
1

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.

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)
print(encryption)

# 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/121.0.0.0 Safari/537.36

Challenge Information:

Learn String Manipulation by Building a Cipher - Step 69

2

how can we help? 

3

Add a third parameter called direction to your function definition. :white_check_mark:

Also, comment out the last two lines of code to avoid errors in the console. :x:

4

you need to put # in front of last two lines (Also, comment out the last two lines of code to avoid errors in the console)

5

This topic was automatically closed 182 days after the last reply. New replies are no longer allowed.