input: def rearrange_divisible_by_three(lst: list):
      """This method accepts a list lst and provides a list lst' such that
      lst' retains the same elements as lst at positions not divisible by three. At positions that are divisible by three, the values
      are those of the corresponding positions in lst, but sorted.
      >>> rearrange_divisible_by_three([1, 2, 3])
      [1, 2, 3]
      >>> rearrange_divisible_by_three([5, 6, 3, 4, 8, 9, 2])
      [2, 6, 3, 4, 8, 9, 5]
      """
output:     result = lst[:]
      divisible_by_three_indices = [i for i in range(len(lst)) if i % 3 == 0]
      values_at_divisible_by_three = sorted(lst[i] for i in divisible_by_three_indices)
  
      for idx, value in zip(divisible_by_three_indices, values_at_divisible_by_three):
          result[idx] = value
  
      return result