code: 
  
  
  
  
  
  def       lowerCAmelCase__(	lowercase       :    str				) ->    int:
    __snake_case   :				Any        =       str(lowercase				).strip()
    if not bin_string:
      raise ValueError("Empty string was passed to the function"				)
    __snake_case   :				Any        =       bin_string[0] == "-"
    if is_negative:
      __snake_case   :				Optional[Any]        =       bin_string[1:]
    if not all(char in "01" for char in bin_string				):
      raise ValueError("Non-binary value was passed to the function"				)
    __snake_case   :				Any        =       0
    for char in bin_string:
      __snake_case   :				str        =       2 * decimal_number + int(lowercase				)
    return -decimal_number if is_negative else decimal_number
  
  
  if __name__ == "__main__":
       from doctest import testmod
  
       testmod()
  
  
style_context: 
  
  
  
  
  
  from typing import TYPE_CHECKING
  
  from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available
  
  
  _UpperCamelCase       = {'''configuration_nat''': ['''NAT_PRETRAINED_CONFIG_ARCHIVE_MAP''', '''NatConfig''']}
  
  
  try:
       if not is_torch_available():
            raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
       pass
  else:
       _UpperCamelCase       = [
           '''NAT_PRETRAINED_MODEL_ARCHIVE_LIST''',
           '''NatForImageClassification''',
           '''NatModel''',
           '''NatPreTrainedModel''',
           '''NatBackbone''',
       ]
  
  if TYPE_CHECKING:
       from .configuration_nat import NAT_PRETRAINED_CONFIG_ARCHIVE_MAP, NatConfig
  
       try:
            if not is_torch_available():
                 raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
            pass
       else:
            from .modeling_nat import (
                NAT_PRETRAINED_MODEL_ARCHIVE_LIST,
                NatBackbone,
                NatForImageClassification,
                NatModel,
                NatPreTrainedModel,
            )
  
  else:
       import sys
  
       _UpperCamelCase       = _LazyModule(__name__, globals()['''__file__'''], _import_structure, module_spec=__spec__)
  
  