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validating credit card numbers

vip_codes answered on December 7, 2021 Popularity 10/10 Helpfulness 2/10

answer validating credit card numbers

validating credit card numbers

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python
import re

def check(card):
    if not re.search("^[456]\d{3}(-?\d{4}){3}$",card) or re.search(r"(\d)\1{3}", re.sub("-", "",card)):
        return False
    return True

for i in range(int(input())):
    print("Valid" if check(input()) else "Invalid")

Popularity 10/10 Helpfulness 2/10 Language python

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Tags: credit-card numbers python validating

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