input: 
  def return_two_values():
      """
      This function shows how to return two values from a Python function.
      It demonstrates by returning a tuple of two values.
      
      >>> return_two_values()
      ('ABC', 123)
      """
      value1 = "ABC"
      value2 = 123
      return value1, value2
  
output:     value1 = "ABC"
      value2 = 123
      return value1, value2