Credit card number redacting script

[ichabod801]

In order for a function to properly return value, when the function is called, it’s necessary to declare it as a variable. I see now.

Actually, defining a variable is not necessary, the return statement is necessary. This works just fine:

def three():
     return 5

But seeing someone demonstrate enumerate in the context of my fake credit card redaction task here I think would really help me understand the concept better.

def ccredact(card_string):
    redacted = []
    for letter_index, letter in enumerate(card_string):
        if letter_index < 12:
            redacted.append('*')
        else:
            redacted.append(letter)
        if letter_index in (3, 7, 11):
            redacted.append('-')
    return ''.join(redacted)