code: 
  
  
  import unittest
  
  from cer import CER
  
  
  lowerCAmelCase__   	=				CER()
  
  
  
  
  
  
  
  class   lowerCAmelCase__ (       unittest.TestCase):
  
  
  
  
       '''simple docstring'''
  
  
       def 				_lowerCamelCase				(		self)    ->       str:
              _A   : List[Any]       					=				["White House"]
              _A   : int       					=				["white house"]
              # S = 2, D = 0, I = 0, N = 11, CER = 2 / 11
              _A   : List[Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.1_8_1_8_1_8_1_8_1_8) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       str:
              _A   : List[str]       					=				["were wolf"]
              _A   : int       					=				["werewolf"]
              # S = 0, D = 0, I = 1, N = 9, CER = 1 / 9
              _A   : Optional[int]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.1_1_1_1_1_1_1) < 1e-6)
  
              _A   : Any       					=				["werewolf"]
              _A   : Optional[int]       					=				["weae     wolf"]
              # S = 1, D = 1, I = 0, N = 8, CER = 0.25
              _A   : List[Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.2_5) < 1e-6)
  
              # consecutive whitespaces case 1
              _A   : Optional[Any]       					=				["were wolf"]
              _A   : List[str]       					=				["were               wolf"]
              # S = 0, D = 0, I = 0, N = 9, CER = 0
              _A   : Dict       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.0) < 1e-6)
  
              # consecutive whitespaces case 2
              _A   : int       					=				["were   wolf"]
              _A   : Optional[Any]       					=				["were               wolf"]
              # S = 0, D = 0, I = 0, N = 9, CER = 0
              _A   : List[Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.0) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       Optional[Any]:
              _A   : Union[str, Any]       					=				["werewolf"]
              _A   : Optional[int]       					=				["weaewolf"]
              # S = 1, D = 0, I = 0, N = 8, CER = 0.125
              _A   : Any       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.1_2_5) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       Union[str, Any]:
              _A   : List[Any]       					=				["werewolf"]
              _A   : int       					=				["wereawolf"]
              # S = 0, D = 1, I = 0, N = 8, CER = 0.125
              _A   : List[Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.1_2_5) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       Tuple:
              _A   : Tuple       					=				["werewolf"]
              _A   : Optional[int]       					=				["wereolf"]
              # S = 0, D = 0, I = 1, N = 8, CER = 0.125
              _A   : Union[str, Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.1_2_5) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       List[Any]:
              _A   : Optional[int]       					=				["werewolf"]
              _A   : Tuple       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertEqual(__lowerCamelCase				,		0.0)
  
  
       def 				_lowerCamelCase				(		self)    ->       List[str]:
              _A   : Dict       					=				["werewolf", "I am your father"]
              _A   : int       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertEqual(__lowerCamelCase				,		0.0)
  
              _A   : int       					=				["werewolf", "I am your father", "doge"]
              _A   : Dict       					=				["werxwolf", "I       am your father", "doge"]
              # S = 1, D = 0, I = 0, N = 28, CER = 1 / 28
              _A   : str       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.0_3_5_7_1_4_2_8) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       Tuple:
              _A   : List[Any]       					=				["My hovercraft", "is full of eels"]
              _A   : List[str]       					=				["My hovercraft is full", " of eels"]
              # S = 0, D = 0, I = 2, N = 28, CER = 2 / 28
              # whitespace at the front of " of eels" will be strip during preporcessing
              # so need to insert 2 whitespaces
              _A   : Union[str, Any]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase				,		concatenate_texts=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.0_7_1_4_2_8) < 1e-6)
  
  
       def 				_lowerCamelCase				(		self)    ->       int:
              _A   : Optional[Any]       					=				["我能吞下玻璃而不伤身体"]
              _A   : List[str]       					=				[" 能吞虾玻璃而 不霜身体啦"]
              # S = 3, D = 2, I = 0, N = 11, CER = 5 / 11
              _A   : Optional[int]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.4_5_4_5_4_5_4_5_4_5) < 1e-6)
  
              _A   : List[str]       					=				["我能吞下玻璃", "而不伤身体"]
              _A   : Tuple       					=				["我    能 吞 下 玻 璃", "而不伤身体"]
              # S = 0, D = 5, I = 0, N = 11, CER = 5 / 11
              _A   : Dict       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertTrue(abs(char_error_rate - 0.4_5_4_5_4_5_4_5_4_5_4_5) < 1e-6)
  
              _A   : Union[str, Any]       					=				["我能吞下玻璃而不伤身体"]
              _A   : Optional[int]       					=				cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
              self.assertFalse(__lowerCamelCase				,		0.0)
  
  
       def 				_lowerCamelCase				(		self)    ->       Tuple:
              _A   : str       					=				[""]
              _A   : Tuple       					=				["Hypothesis"]
              with self.assertRaises(__lowerCamelCase):
                     cer.compute(predictions=__lowerCamelCase				,		references=__lowerCamelCase)
  
  
  if __name__ == "__main__":
      unittest.main()
  
style_context: 
  
  
  from typing import TYPE_CHECKING
  
  from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available, is_vision_available
  
  
  lowerCAmelCase__   	=				{
      'configuration_deta': ['DETA_PRETRAINED_CONFIG_ARCHIVE_MAP', 'DetaConfig'],
  }
  
  try:
      if not is_vision_available():
          raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
      pass
  else:
      lowerCAmelCase__   	=				['DetaImageProcessor']
  
  try:
      if not is_torch_available():
          raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
      pass
  else:
      lowerCAmelCase__   	=				[
          'DETA_PRETRAINED_MODEL_ARCHIVE_LIST',
          'DetaForObjectDetection',
          'DetaModel',
          'DetaPreTrainedModel',
      ]
  
  
  if TYPE_CHECKING:
      from .configuration_deta import DETA_PRETRAINED_CONFIG_ARCHIVE_MAP, DetaConfig
  
      try:
          if not is_vision_available():
              raise OptionalDependencyNotAvailable()
      except OptionalDependencyNotAvailable:
          pass
      else:
          from .image_processing_deta import DetaImageProcessor
  
      try:
          if not is_torch_available():
              raise OptionalDependencyNotAvailable()
      except OptionalDependencyNotAvailable:
          pass
      else:
          from .modeling_deta import (
              DETA_PRETRAINED_MODEL_ARCHIVE_LIST,
              DetaForObjectDetection,
              DetaModel,
              DetaPreTrainedModel,
          )
  
  else:
      import sys
  
      lowerCAmelCase__   	=				_LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)
  