
def 				A	( lowercase			)       ->  bool:
		'''simple docstring'''

		return credit_card_number.startswith(('34', '35', '37', '4', '5', '6')			)


def 				A	( lowercase			)       ->  bool:
		'''simple docstring'''

		UpperCamelCase          =					credit_card_number
		UpperCamelCase          =					0
		UpperCamelCase          =					len(lowercase			) - 2
		for i in range(lowercase   ,	-1   ,	-2			):
				#  double the value of every second digit
				UpperCamelCase          =					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
				UpperCamelCase          =					cc_number[:i] + str(lowercase			) + cc_number[i + 1 :]
				total += digit

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

		return total % 10 == 0


def 				A	( lowercase			)       ->  bool:
		'''simple docstring'''

		UpperCamelCase          =					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(lowercase			) <= 16:
				print(f'''{error_message} of its length.'''			)
				return False

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

		if not luhn_validation(lowercase			):
				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 typing import Optional, Union

import torch
from torch import nn

from ...configuration_utils import ConfigMixin, register_to_config
from ...models.modeling_utils import ModelMixin


class     lowercase (		_SCREAMING_SNAKE_CASE  ,       _SCREAMING_SNAKE_CASE       ):



		@register_to_config
		def __init__(			self    ,				A_ = 768    ,				)  -> List[Any]:
				"""simple docstring"""
				super().__init__()

				UpperCamelCase          =					nn.Parameter(torch.zeros(1    ,				A_	)	)
				UpperCamelCase          =					nn.Parameter(torch.ones(1    ,				A_	)	)



		def __UpperCamelCase			(			self    ,				A_ = None    ,				A_ = None    ,				)  -> Any:
				"""simple docstring"""
				UpperCamelCase          =					nn.Parameter(self.mean.to(A_	).to(A_	)	)
				UpperCamelCase          =					nn.Parameter(self.std.to(A_	).to(A_	)	)
				return self



		def __UpperCamelCase			(			self    ,				A_	)  -> Dict:
				"""simple docstring"""
				UpperCamelCase          =					(embeds - self.mean) * 1.0 / self.std
				return embeds



		def __UpperCamelCase			(			self    ,				A_	)  -> Dict:
				"""simple docstring"""
				UpperCamelCase          =					(embeds * self.std) + self.mean
				return embeds
