input: 
  def return_multiple_values() -> tuple:
      """
      Demonstrate how to return two values from a Python function.
      
      >>> result = return_multiple_values()
      >>> result[0]
      'ABC'
      >>> result[1]
      123
      """
      value1 = "ABC"
      value2 = 123
      return value1, value2
  
output:     value1 = "ABC"
      value2 = 123
      return value1, value2