





"""simple docstring"""





def 					__A  (_SCREAMING_SNAKE_CASE     )   ->bool:





  """simple docstring"""


  return credit_card_number.startswith(('34', '35', '37', '4', '5', '6')     )
def 					__A  (_SCREAMING_SNAKE_CASE     )   ->bool:





  """simple docstring"""


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

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

  return total % 10 == 0
def 					__A  (_SCREAMING_SNAKE_CASE     )   ->bool:





  """simple docstring"""


  lowerCAmelCase__     :Any											=				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(_SCREAMING_SNAKE_CASE     ) <= 16:
    print(F"{error_message} of its length."     )
    return False

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

  if not luhn_validation(_SCREAMING_SNAKE_CASE     ):
    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""")







"""simple docstring"""





import tempfile
import unittest

from make_student import create_student_by_copying_alternating_layers

from transformers import AutoConfig
from transformers.file_utils import cached_property
from transformers.testing_utils import require_torch


__A											=						"""sshleifer/bart-tiny-random"""
__A											=						"""patrickvonplaten/t5-tiny-random"""






@require_torch
class    _lowerCAmelCase  (	unittest.TestCase			):
       """simple docstring"""




       @cached_property
       def 	snake_case		(       self ):



         '''simple docstring'''

         return AutoConfig.from_pretrained(__UpperCAmelCase )






       def 	snake_case		(       self ):



         '''simple docstring'''

         lowerCAmelCase__				,							*lowerCAmelCase__     :List[str]											=				create_student_by_copying_alternating_layers(__UpperCAmelCase       ,					tempfile.mkdtemp()       ,					e=1       ,					d=1 )
         self.assertEqual(student.config.num_hidden_layers       ,					1 )






       def 	snake_case		(       self ):



         '''simple docstring'''

         lowerCAmelCase__				,							*lowerCAmelCase__     :Optional[int]											=				create_student_by_copying_alternating_layers(__UpperCAmelCase       ,					tempfile.mkdtemp()       ,					e=1       ,					d=__UpperCAmelCase )






       def 	snake_case		(       self ):



         '''simple docstring'''

         lowerCAmelCase__				,							*lowerCAmelCase__     :List[Any]											=				create_student_by_copying_alternating_layers(__UpperCAmelCase       ,					tempfile.mkdtemp()       ,					e=1       ,					d=__UpperCAmelCase )
         self.assertEqual(student.config.encoder_layers       ,					1 )
         self.assertEqual(student.config.decoder_layers       ,					self.teacher_config.encoder_layers )






       def 	snake_case		(       self ):



         '''simple docstring'''

         lowerCAmelCase__				,							*lowerCAmelCase__     :Optional[int]											=				create_student_by_copying_alternating_layers(__UpperCAmelCase       ,					tempfile.mkdtemp()       ,					e=1       ,					d=1 )
         self.assertEqual(student.config.encoder_layers       ,					1 )
         self.assertEqual(student.config.decoder_layers       ,					1 )






       def 	snake_case		(       self ):



         '''simple docstring'''

         with self.assertRaises(__UpperCAmelCase ):
           create_student_by_copying_alternating_layers(__UpperCAmelCase       ,					tempfile.mkdtemp()       ,					e=__UpperCAmelCase       ,					d=__UpperCAmelCase )
