input: Write a function to swap the values of two variables. The function should take two variables as input and print the values of both variables after swapping.
  assert swap_values(5, 10)==("x: 10", "y: 5")
  assert swap_values(100, 200)==("x: 200", "y: 100")
  assert swap_values('a', 'b')==("x: b", "y: a")
  assert swap_values(True, False)==("x: False", "y: True")
  assert swap_values(3.14, 2.71)==("x: 2.71", "y: 3.14")
output: def swap_values(x, y):
      x, y = y, x
      return f"x: {x}", f"y: {y}"