code: def _try_parse_filename_list(self, file_name):
      # multiple images -> one gt label
      if len(file_name) > 0 and file_name[0] == "[":
          try:
              info = json.loads(file_name)
              file_name = random.choice(info)
          except:
              pass
      return file_name
  
imports: import numpy
  import cv2
  import math
  import os
  import json
  import random
  import traceback
  from paddle.io import Dataset
  from .imaug import transform, create_operators
label_desc: Use image node_id 5 for calling the SimpleDataSet obj's underlying member method code with example usage: obj._try_parse_filename_list(file_name) and returns: file_name