code: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  import numpy as np
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Optional[Any]       						= np.array(snake_case   )
     SCREAMING_SNAKE_CASE__			:				List[Any]       						= np.array(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				Union[str, Any]       						= abs(predict - actual   )
     SCREAMING_SNAKE_CASE__			:				int       						= difference.mean()
  
     return score
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Dict       						= np.array(snake_case   )
     SCREAMING_SNAKE_CASE__			:				Tuple       						= np.array(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				Any       						= predict - actual
     SCREAMING_SNAKE_CASE__			:				Tuple       						= np.square(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				Optional[Any]       						= square_diff.mean()
     return score
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Dict       						= np.array(snake_case   )
     SCREAMING_SNAKE_CASE__			:				Optional[int]       						= np.array(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				List[Any]       						= predict - actual
     SCREAMING_SNAKE_CASE__			:				Tuple       						= np.square(snake_case   )
     SCREAMING_SNAKE_CASE__			:				Union[str, Any]       						= square_diff.mean()
     SCREAMING_SNAKE_CASE__			:				Any       						= np.sqrt(snake_case   )
     return score
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				List[Any]       						= np.array(snake_case   )
     SCREAMING_SNAKE_CASE__			:				List[Any]       						= np.array(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				Any       						= np.log(predict + 1   )
     SCREAMING_SNAKE_CASE__			:				Optional[int]       						= np.log(actual + 1   )
  
     SCREAMING_SNAKE_CASE__			:				Optional[Any]       						= log_predict - log_actual
     SCREAMING_SNAKE_CASE__			:				List[str]       						= np.square(snake_case   )
     SCREAMING_SNAKE_CASE__			:				Tuple       						= square_diff.mean()
  
     SCREAMING_SNAKE_CASE__			:				List[str]       						= np.sqrt(snake_case   )
  
     return score
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				str       						= np.array(snake_case   )
     SCREAMING_SNAKE_CASE__			:				List[Any]       						= np.array(snake_case   )
  
     SCREAMING_SNAKE_CASE__			:				Optional[int]       						= predict - actual
     SCREAMING_SNAKE_CASE__			:				Dict       						= np.sum(snake_case   ) / len(snake_case   )
     SCREAMING_SNAKE_CASE__			:				Tuple       						= np.sum(snake_case   ) / len(snake_case   )
     # print(numerator, denumerator)
     SCREAMING_SNAKE_CASE__			:				int       						= float(snake_case   ) / denumerator * 1_00
  
     return score
  
  
  
  
  
  
  
  def 				UpperCamelCase	(  snake_case	,     snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     return np.mean(np.array(snake_case   ) == np.array(snake_case   )   )
  
  
style_context: 
  
  
  
  
  '''simple docstring'''
  
  
  
  
  
  lowercase__			=	{
      '''+''': lambda x, y: x + y,
      '''-''': lambda x, y: x - y,
      '''*''': lambda x, y: x * y,
      '''/''': lambda x, y: x / y,
  }
  
  
  def 				UpperCamelCase	(  snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     return c.isdigit()
  
  
  def 				UpperCamelCase	(  snake_case   ):
  
  
  
  
     '''simple docstring'''
  
     SCREAMING_SNAKE_CASE__			:				Union[str, Any]       						= []
  
     # iterate over the string in reverse order
     for c in expression.split()[::-1]:
        # push operand to stack
        if is_operand(snake_case   ):
           stack.append(int(snake_case   )   )
  
        else:
           # pop values from stack can calculate the result
           # push the result onto the stack again
           SCREAMING_SNAKE_CASE__			:				Dict       						= stack.pop()
           SCREAMING_SNAKE_CASE__			:				Any       						= stack.pop()
           stack.append(calc[c](snake_case	,     snake_case   )   )
  
     return stack.pop()
  
  
  # Driver code
  if __name__ == "__main__":
         lowercase__			=	'''+ 9 * 2 6'''
         print(evaluate(test_expression))
  
         lowercase__			=	'''/ * 10 2 + 4 1 '''
         print(evaluate(test_expression))
  
  