code: def __init__(
      self, num_classes, thing_ids, label_divisor, ignore_index
  ):
      super().__init__()
      self.num_classes = num_classes
      self.thing_ids = thing_ids
      self.label_divisor = label_divisor
      self.ignore_index = ignore_index
  
imports: import abc
  from paddlepanseg.cvlibs import build_info_dict
label_desc: Use image node_id 1 to create a new Postprocessor object  with example: obj = Postprocessor(num_classes, thing_ids, label_divisor, ignore_index)