https://codeperfectplus.com/hackerrank-python-solution-validating-credit-card-numbers

credit_card_numbers.py

import re

# compile the patterns
pattern = re.compile(
		r'^'
		r'(?!.*(\d)(-?\1){3})'
		r'[456]\d{3}'
		r'(?:-?\d{4}){3}'
		r'$')


# validating credit card numbers
def validate_credit_card_number(card_number):
	if pattern.match(card_number):
		return 'Valid'
	else:
		return 'Invalid'


# main function
if __name__ == '__main__':
	N = int(input())
	for _ in range(N):
		card_number = input()
		print(validate_credit_card_number(card_number))