input: def sum_list(input_list: List[int]) -> int:
      """
      Takes a list of integers and returns the sum of the items in the list.
  
      >>> sum_list([1, 2, 3, 4])
      10
      >>> sum_list([-1, 0, 1])
      0
      """
output:     total = 0
      for num in input_list:
          total += num
      return total