code: 
  
  
  
  """simple docstring"""
  from collections import namedtuple
  
  _lowerCAmelCase					:str  =      namedtuple('from_to', 'from_ to')
  
  _lowerCAmelCase					:Union[str, Any]  =      {
      'atm': from_to(1, 1),
      'pascal': from_to(0.0000098, 101_325),
      'bar': from_to(0.986923, 1.01325),
      'kilopascal': from_to(0.00986923, 101.325),
      'megapascal': from_to(9.86923, 0.101325),
      'psi': from_to(0.068046, 14.6959),
      'inHg': from_to(0.0334211, 29.9213),
      'torr': from_to(0.00131579, 760),
  }
  
  
  
  
  
  def 				lowerCamelCase_		(UpperCamelCase__	:	float  , UpperCamelCase__	:	str  , UpperCamelCase__	:	str							):
      if from_type not in PRESSURE_CONVERSION:
          raise ValueError(
              F'Invalid \'from_type\' value: {from_type!r}  Supported values are:\n'
              + ''', '''.join(UpperCamelCase__							)							)
      if to_type not in PRESSURE_CONVERSION:
          raise ValueError(
              F'Invalid \'to_type\' value: {to_type!r}.  Supported values are:\n'
              + ''', '''.join(UpperCamelCase__							)							)
      return (
          value * PRESSURE_CONVERSION[from_type].from_ * PRESSURE_CONVERSION[to_type].to
      )
  
  
  if __name__ == "__main__":
    import doctest
  
    doctest.testmod()
  
  
  
style_context: 
  
  
  
  """simple docstring"""
  def 				lowerCamelCase_		(UpperCamelCase__	:	List[Any]  , UpperCamelCase__	:	int							):
      sequence.append(UpperCamelCase__							)
  
      _UpperCAmelCase							:						str       							=					0
      while sequence[index] != target:
          index += 1
  
      sequence.pop()
  
      if index == len(UpperCamelCase__							):
          return None
  
      return index
  
  
  if __name__ == "__main__":
    _lowerCAmelCase					:Dict  =      input('Enter numbers separated by comma:\n').strip()
    _lowerCAmelCase					:List[Any]  =      [int(item) for item in user_input.split(',')]
  
    _lowerCAmelCase					:int  =      input('Enter a single number to be found in the list:\n')
    _lowerCAmelCase					:List[Any]  =      int(target_input)
    _lowerCAmelCase					:Optional[int]  =      sentinel_linear_search(sequence, target)
    if result is not None:
      print(f"{target} found at positions: {result}")
    else:
      print('Not found')
  
  
  