code: def compress(item_list, flag_list):
      
      assert len(item_list) == len(flag_list), (
          'lists should correspond. len(item_list)=%r len(flag_list)=%r' %
          (len(item_list), len(flag_list)))
      filtered_items = list(util_iter.iter_compress(item_list, flag_list))
      return filtered_items
docs: like np.compress but for lists
  
      Returns items in item list where the corresponding item in flag list is
      True
  
      Args:
          item_list (list): list of items to mask
          flag_list (list): list of booleans used as a mask
  
      Returns:
          list : filtered_items - masked items