



'''simple docstring'''

import contextlib
import importlib
import io
import unittest

import transformers

# Try to import everything from transformers to ensure every object can be loaded.
from transformers import *  # noqa F406
from transformers.testing_utils import DUMMY_UNKNOWN_IDENTIFIER, require_flax, require_tf, require_torch
from transformers.utils import ContextManagers, find_labels, is_flax_available, is_tf_available, is_torch_available


if is_torch_available():
							from transformers import BertForPreTraining, BertForQuestionAnswering, BertForSequenceClassification

if is_tf_available():
							from transformers import TFBertForPreTraining, TFBertForQuestionAnswering, TFBertForSequenceClassification

if is_flax_available():
							from transformers import FlaxBertForPreTraining, FlaxBertForQuestionAnswering, FlaxBertForSequenceClassification


__lowerCAmelCase									=   DUMMY_UNKNOWN_IDENTIFIER
# An actual model hosted on huggingface.co

__lowerCAmelCase									=   '''main'''
# Default branch name
__lowerCAmelCase									=   '''f2c752cfc5c0ab6f4bdec59acea69eefbee381c2'''
# One particular commit (not the top of `main`)
__lowerCAmelCase									=   '''aaaaaaa'''
# This commit does not exist, so we should 404.

__lowerCAmelCase									=   '''d9e9f15bc825e4b2c9249e9578f884bbcb5e3684'''
# Sha-1 of config.json on the top of `main`, for checking purposes
__lowerCAmelCase									=   '''4b243c475af8d0a7754e87d7d096c92e5199ec2fe168a2ee7998e3b8e9bcb1d3'''



@contextlib.contextmanager
def      __lowerCamelCase     (      )			->      str:
		print('Welcome!'  )
		yield
		print('Bye!'  )



@contextlib.contextmanager
def      __lowerCamelCase     (      )			->      Tuple:
		print('Bonjour!'  )
		yield
		print('Au revoir!'  )

class 	__magic_name__						(    unittest.TestCase   ):







							def 							__lowercase			(							self					:       Optional[int]		):
									assert transformers.__spec__ is not None
									assert importlib.util.find_spec('transformers'		) is not None

class 	__magic_name__						(    unittest.TestCase   ):







							@unittest.mock.patch('sys.stdout'	,new_callable=io.StringIO		)
							def 							__lowercase			(							self					:       Optional[int]	,_UpperCAmelCase					:       Union[str, Any]		):
									with ContextManagers([]		):
											print('Transformers are awesome!'		)
									# The print statement adds a new line at the end of the output
									self.assertEqual(mock_stdout.getvalue()	,'Transformers are awesome!\n'		)







							@unittest.mock.patch('sys.stdout'	,new_callable=io.StringIO		)
							def 							__lowercase			(							self					:       Tuple	,_UpperCAmelCase					:       Optional[int]		):
									with ContextManagers([context_en()]		):
											print('Transformers are awesome!'		)
									# The output should be wrapped with an English welcome and goodbye
									self.assertEqual(mock_stdout.getvalue()	,'Welcome!\nTransformers are awesome!\nBye!\n'		)







							@unittest.mock.patch('sys.stdout'	,new_callable=io.StringIO		)
							def 							__lowercase			(							self					:       Tuple	,_UpperCAmelCase					:       int		):
									with ContextManagers([context_fr(), context_en()]		):
											print('Transformers are awesome!'		)
									# The output should be wrapped with an English and French welcome and goodbye
									self.assertEqual(mock_stdout.getvalue()	,'Bonjour!\nWelcome!\nTransformers are awesome!\nBye!\nAu revoir!\n'		)







							@require_torch
							def 							__lowercase			(							self					:       Any		):
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels']		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels', 'next_sentence_label']		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['start_positions', 'end_positions']		)

									class 	__magic_name__						(    __lowerCamelCase   ):
																pass
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels']		)







							@require_tf
							def 							__lowercase			(							self					:       int		):
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels']		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels', 'next_sentence_label']		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['start_positions', 'end_positions']		)

									class 	__magic_name__						(    __lowerCamelCase   ):
																pass
									self.assertEqual(find_labels(_UpperCAmelCase		)	,['labels']		)







							@require_flax
							def 							__lowercase			(							self					:       Any		):
									self.assertEqual(find_labels(_UpperCAmelCase		)	,[]		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,[]		)
									self.assertEqual(find_labels(_UpperCAmelCase		)	,[]		)

									class 	__magic_name__						(    __lowerCamelCase   ):
																pass
									self.assertEqual(find_labels(_UpperCAmelCase		)	,[]		)











from math import factorial




def 		lowerCAmelCase_    (  __UpperCAmelCase:			int		,   __UpperCAmelCase:			int      )      ->	int:

    # If either of the conditions are true, the function is being asked
    # to calculate a factorial of a negative number, which is not possible
    if n < k or k < 0:
        raise ValueError('''Please enter positive integers for n and k where n >= k'''      )
    return factorial(__UpperCAmelCase      ) // (factorial(__UpperCAmelCase      ) * factorial(n - k      ))


if __name__ == "__main__":
  print(
      'The number of five-card hands possible from a standard',
      F'''fifty-two card deck is: {combinations(52, 5)}\n''',
  )

  print(
      'If a class of 40 students must be arranged into groups of',
      F'''4 for group projects, there are {combinations(40, 4)} ways''',
      'to arrange them.\n',
  )

  print(
      'If 10 teams are competing in a Formula One race, there',
      F'''are {combinations(10, 3)} ways that first, second and''',
      'third place can be awarded.',
  )

