Learn String Manipulation by Building a Cipher - Step 67

Tell us what’s happening:

Describe your issue in detail here.

Your code so far

text = 'Hello Zaira'
custom_key = 'python'

def vigenere(message, key):
    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

# User Editable Region

def text (custom_key):
    

# User Editable Region

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 67

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.
Learning to describe problems is hard, but it is an important part of learning how to code.
Also, the more you say, the more we can help!

The step requests is asking:

Call your function passing text and custom_key as the arguments. Store the return value of the function call in a variable called encryption.

To call a function in Python means to write only the name of the function (without the keyword def). When you call a function it is possible that it returns something, which it is asking to save in another variable named encryption.
Here the format

returned_value = called_function(first_argument, second_argument)