input: Write a function to swap the values of two variables and return them. The function should take two parameters and return both parameters after swapping.
  assert swap_values(5, 10) == (10, 5)
  assert swap_values(100, 200) == (200, 100)
  assert swap_values("hello", "world") == ("world", "hello")
  assert swap_values(True, False) == (False, True)
output: def swap_values(a, b):
      return b, a