code: 
  
  
  
  
  
  from math import exp
  
  
  
  
  
  
  
  def 	SCREAMING_SNAKE_CASE							(      __lowerCAmelCase    )				->			float:
       return 8 * x - 2 * exp(-x    )
  
  
  
  
  
  
  
  def 	SCREAMING_SNAKE_CASE							(      __lowerCAmelCase      ,					__lowerCAmelCase      ,					__lowerCAmelCase    )				->			float:
       UpperCamelCase__    :     Any        =						lower_bound
       UpperCamelCase__    :     Any        =						upper_bound
       for _ in range(0      ,					__lowerCAmelCase    ):
            UpperCamelCase__    :     Optional[int]        =						xa, xa - (f(__lowerCAmelCase    ) * (xa - xa)) / (f(__lowerCAmelCase    ) - f(__lowerCAmelCase    ))
       return xa
  
  
  if __name__ == "__main__":
   print(F"""Example: {secant_method(1, 3, 2)}""")
style_context: 
  
  
  
  
  
  
  from __future__ import annotations
  
  
  
  
  
  
  
  def 	SCREAMING_SNAKE_CASE							(      __lowerCAmelCase    )				->			list[int]:
       assert (
           isinstance(__lowerCAmelCase      ,					__lowerCAmelCase    ) and mask > 0
       ), f'mask needs to be positive integer, your input {mask}'
       UpperCamelCase__    :     Any        =						[]
       UpperCamelCase__    :     int        =						mask
  
       while submask:
            all_submasks.append(__lowerCAmelCase    )
            UpperCamelCase__    :     List[str]        =						(submask - 1) & mask
  
       return all_submasks
  
  
  if __name__ == "__main__":
   import doctest
  
   doctest.testmod()