input: 
  def swap_values(x, y):
      """ Swaps the values of two variables and prints the swapped values.
      >>> swap_values(5, 10)
      x: 10
      y: 5
      """
  
output:     temp = x
      x = y
      y = temp
      print(f"x: {x}")
      print(f"y: {y}")