input: def sum_ints(*args):
      """
      This function takes any number of integer arguments and returns their sum.
      >>> sum_ints(3, 5, 7)
      15
      >>> sum_ints(1, 2, 3, 4, 5)
      15
      """
      total = 0
      for num in args:
          total += num
      
      return total
output:     total = 0
      for num in args:
          if isinstance(num, int):
              total += num
      
      return total