code: def parse_class_id_map(self, class_id_map_file):
      if class_id_map_file is None:
          return None
      if not os.path.exists(class_id_map_file):
          print(
              "Warning: If want to use your own label_dict, please input legal path!\nOtherwise label_names will be empty!"
          )
          return None
  
      try:
          class_id_map = {}
          with open(class_id_map_file, "r") as fin:
              lines = fin.readlines()
              for line in lines:
                  partition = line.split("\n")[0].partition(" ")
                  class_id_map[int(partition[0])] = str(partition[-1])
      except Exception as ex:
          print(ex)
          class_id_map = None
      return class_id_map
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import base64
  import inspect
  import math
  import os
  import random
  import sys
  from functools import partial
  import cv2
  import numpy
  import paddle
  import paddle.nn.functional
  import six
  from paddle.vision.transforms import ColorJitter
  from PIL import Image
label_desc: Use image node_id 2 for calling the Topk obj's underlying member method code with example usage: obj.parse_class_id_map(class_id_map_file) and returns: class_id_map, None, None