> validate_credit_card_number('36111111111111')ДЈ6111111111111 is an invalid credit card number because of its first two digits. Helloworld$ is an invalid credit card number because it has nonnumerical characters.ДЈ2323 is an invalid credit card number because of its length. > validate_credit_card_number('helloworld$') Causes a payment to be APPROVED and the refund to be DECLINED. > validate_credit_card_number('4111111111111111')Д¤111111111111111 is a valid credit card number. Use these card numbers to test other responses in sandbox: Card Number. Return total % 10 = 0 def validate_credit_card_number( credit_card_number: str) -> bool:ДЇunction to validate the given credit card number. # Sum up the remaining digits for i in range( len(cc_number) - 1, - 1, - 2): if digit > 9:Д¬c_number = cc_number + str(digit) + cc_number Half_len = len(cc_number) - 2 for i in range(half_len, - 1, - 2):Дigit *= 2 # If doubling of a number results in a two digit number # i.e greater than 9(e.g., 6 Г— 2 = 12), # then add the digits of the product (e.g., 12: 1 + 2 = 3, 15: 1 + 5 = 6), # to get a single digit number. ''' return credit_card_number.startswith(( '34', '35', '37', '4', '5', '6'))Дef luhn_validation( credit_card_number: str) -> bool:ДЇunction to luhn algorithm validation for a given credit card number. > all(validate_initial_digits(cc) is False for cc in invalid.split()) Subject to the terms in this Agreement, PayPal agrees to provide (i) the Payflow Services for which you have enrolled and paid the applicable fees, and (ii) access to standardized reports regarding your Transactions processed using the Payflow Services and certain reporting tools to assist you. > all(validate_initial_digits(cc) for cc in valid.split()) If you choose to use the Payflow gateway with a PayPal Payments account, your pricing is likely to be 2.9 + 30 cents per transaction, though volume discounts may be available. That cost is in addition to the pricing set by your credit card processing company for transactions. ''' def validate_initial_digits( credit_card_number: str) -> bool:ДЇunction to validate initial digits of a given credit card number. The cost to use Payflow as a gateway only is 10 cents per transaction. Functions for testing the validity of credit card numbers.

Payflow credit card validator