input: Write a function to sort the list items in descending order using Python. The function should take a list as input and modify it in place to arrange its elements in descending order.
  assert sort_descending([3, 7, 5, 8, 10])==[10, 8, 7, 5, 3]
  assert sort_descending([1, 2, 3, 4, 5])==[5, 4, 3, 2, 1]
  assert sort_descending([])==[]
  assert sort_descending([9, 1, 8, 2, 7, 3])==[9, 8, 7, 3, 2, 1]
output: def sort_descending(lst):
      lst.sort(reverse=True)