





def 							SCREAMING_SNAKE_CASE__						(    __a   ):
	return credit_card_number.startswith(('34', '35', '37', '4', '5', '6')   )


def 							SCREAMING_SNAKE_CASE__						(    __a   ):
	snake_case_		:			int											=	credit_card_number
	snake_case_		:			Dict											=	0
	snake_case_		:			List[str]											=	len(_UpperCAmelCase   ) - 2
	for i in range(_UpperCAmelCase   , -1   , -2   ):
		#  double the value of every second digit
		snake_case_		:			List[str]											=	int(cc_number[i]   )
		digit *= 2
		# If doubling of a number results in a two digit number
		# i.e greater than 9(e.g., 6 × 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.
		if digit > 9:
			digit %= 10
			digit += 1
		snake_case_		:			int											=	cc_number[:i] + str(_UpperCAmelCase   ) + cc_number[i + 1 :]
		total += digit

	# Sum up the remaining digits
	for i in range(len(_UpperCAmelCase   ) - 1   , -1   , -2   ):
		total += int(cc_number[i]   )

	return total % 10 == 0


def 							SCREAMING_SNAKE_CASE__						(    __a   ):
	snake_case_		:			Tuple											=	f"""{credit_card_number} is an invalid credit card number because"""
	if not credit_card_number.isdigit():
		print(f"""{error_message} it has nonnumerical characters."""   )
		return False

	if not 13 <= len(_UpperCAmelCase   ) <= 16:
		print(f"""{error_message} of its length."""   )
		return False

	if not validate_initial_digits(_UpperCAmelCase   ):
		print(f"""{error_message} of its first two digits."""   )
		return False

	if not luhn_validation(_UpperCAmelCase   ):
		print(f"""{error_message} it fails the Luhn check."""   )
		return False

	print(f"""{credit_card_number} is a valid credit card number."""   )
	return True


if __name__ == "__main__":
						import doctest

						doctest.testmod()
						validate_credit_card_number("""4111111111111111""")
						validate_credit_card_number("""32323""")








from ....utils import logging


_SCREAMING_SNAKE_CASE      	=		logging.get_logger(__name__)
class SCREAMING_SNAKE_CASE_						(					snake_case_					):






						def __init__(      self      :      str		,   _A      :      List[Any]		,   _A      :      List[Any]=None		,   _A      :      str=2048	)							->    Optional[int]:







							"""simple docstring"""


							snake_case_		:			Tuple											=	config.__dict__
							snake_case_		:			List[str]											=	modal_hidden_size
							if num_labels:
								snake_case_		:			int											=	num_labels

