input: from typing import List
  
  
  def get_greatest_2(items: List[int]) -> List[int]:
      """ Find the greatest 2 numbers from a given list of integers.
      >>> get_greatest_2([1, 5, 3, 7, 4, 7, 8, 9, 2, 10, 6, 8])
      [9, 8]
      """
      max1 = max2 = float('-inf')
      for item in items:
          if item > max1:
              max1, max2 = item, max1
          elif item > max2:
              max2 = item
      return [max1, max2]
output:     max1 = max2 = float('-inf')
      for item in items:
          if item > max1:
              max1, max2 = item, max1
          elif item > max2:
              max2 = item
      return [max1, max2]