





def _a							(      lowerCamelCase:  int					)      ->		int:







      '''simple docstring'''






      if not isinstance(lowerCamelCase   ,							lowerCamelCase					):
            raise ValueError('''double_factorial() only accepts integral values'''					)
      if num < 0:
            raise ValueError('''double_factorial() not defined for negative values'''					)
      __A			  =							1
      for i in range(lowerCamelCase   ,							0   ,							-2					):
            value *= i
      return value


if __name__ == "__main__":
       import doctest

       doctest.testmod()












from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_tokenizers_available, is_torch_available


snake_case__   :				Tuple						=	{
    'configuration_realm': ['REALM_PRETRAINED_CONFIG_ARCHIVE_MAP', 'RealmConfig'],
    'tokenization_realm': ['RealmTokenizer'],
}

try:
       if not is_tokenizers_available():
              raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
       pass
else:
       snake_case__   :				Tuple						=	['RealmTokenizerFast']

try:
       if not is_torch_available():
              raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
       pass
else:
       snake_case__   :				str						=	[
           'REALM_PRETRAINED_MODEL_ARCHIVE_LIST',
           'RealmEmbedder',
           'RealmForOpenQA',
           'RealmKnowledgeAugEncoder',
           'RealmPreTrainedModel',
           'RealmReader',
           'RealmScorer',
           'load_tf_weights_in_realm',
       ]
       snake_case__   :				Any						=	['RealmRetriever']


if TYPE_CHECKING:
       from .configuration_realm import REALM_PRETRAINED_CONFIG_ARCHIVE_MAP, RealmConfig
       from .tokenization_realm import RealmTokenizer

       try:
              if not is_tokenizers_available():
                     raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
              pass
       else:
              from .tokenization_realm import RealmTokenizerFast

       try:
              if not is_torch_available():
                     raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
              pass
       else:
              from .modeling_realm import (
                  REALM_PRETRAINED_MODEL_ARCHIVE_LIST,
                  RealmEmbedder,
                  RealmForOpenQA,
                  RealmKnowledgeAugEncoder,
                  RealmPreTrainedModel,
                  RealmReader,
                  RealmScorer,
                  load_tf_weights_in_realm,
              )
              from .retrieval_realm import RealmRetriever


else:
       import sys

       snake_case__   :				Any						=	_LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)





