input: 
  def find_divisors(num: int) -> List[int]:
      """Given a number, the function returns a list of all its divisors.
          >>> find_divisors(12)
          [1, 2, 3, 4, 6, 12]
          >>> find_divisors(17)
          [1, 17]
      """
      divisors = []
      for i in range(1, num + 1):
          if num % i == 0:
              divisors.append(i)
      return divisors
  
output:     divisors = []
      for i in range(1, num + 1):
          if num % i == 0:
              divisors.append(i)
      return divisors