Python 🐍 challenge_33⚔️

#python #beginners #challenge #tutorial

Credit Card Mask 💳

Usually when you buy something, you're asked whether your credit card number,
phone number or answer to your most secret question is still correct.
However, since someone could look over your shoulder,
you don't want that shown on your screen. Instead, we mask it.
Your task is to write a function maskify,
which changes all but the last four characters into '#'.

Examples:

"4556364607935616"      -->  "############5616"
"64607935616"           -->      "#######5616"
"1"                     -->                "1"
""                      -->                 ""

"What was the name of your first pet?"

"Skippy"                                    --> "##ippy"
"Nananananananananananananananana Batman!"  --> "####################################man!"

Task URL: https://www.codewars.com/kata/5412509bd436bd33920011bc/python

My Solution:

def maskify(cc):
    """
    Masks the credit card number by replacing 
        all but the last four characters with '#'
    Args:
        cc (str): The credit card number as a string
    Returns:
        str: The masked credit card number
    """
    credit_card = str(cc)

    if len(credit_card) == 1 or len(credit_card) == 4:
        return credit_card
    if credit_card == "":
        return ""

    start = credit_card[0:-4]
    end = credit_card[-4:]
    hash = len(start) * '#'
    hash_credit_card = "".join([hash, end])

    return hash_credit_card