input: Write a python function to search for a number in a list and return its index, or -1 if not found.
  assert search_list([1, 2, 3, 4, 5], 3) == 2
  assert search_list([10, 20, 30, 40, 50], 25) == -1
  assert search_list([5, 7, 9, 11, 13], 11) == 3
output: def search_list(lst, number):
      try:
          return lst.index(number)
      except ValueError:
          return -1