code: def __getitem__(self, idx):
      try:
          data_line = self.data_lines[idx]
          data_line = data_line.decode("utf-8").strip("\n")
          info = json.loads(data_line)
          file_name = info["filename"]
          cells = info["html"]["cells"].copy()
          structure = info["html"]["structure"]["tokens"].copy()
  
          img_path = os.path.join(self.data_dir, file_name)
          if not os.path.exists(img_path):
              raise Exception("{} does not exist!".format(img_path))
          data = {
              "img_path": img_path,
              "cells": cells,
              "structure": structure,
              "file_name": file_name,
          }
  
          with open(data["img_path"], "rb") as f:
              img = f.read()
              data["image"] = img
          outs = transform(data, self.ops)
      except:
          import traceback
  
          err = traceback.format_exc()
          self.logger.error(
              "When parsing line {}, error happened with msg: {}".format(
                  data_line, err
              )
          )
          outs = None
      if outs is None:
          rnd_idx = (
              np.random.randint(self.__len__())
              if self.mode == "train"
              else (idx + 1) % self.__len__()
          )
          return self.__getitem__(rnd_idx)
      return outs
  
file_path: PaddleOCR/ppocr/data/pubtab_dataset.py
imports: import numpy
  import os
  import random
  from paddle.io import Dataset
  import json
  from copy import deepcopy
  from .imaug import transform, create_operators
label_desc: Use image node_id 5 for calling the PubTabDataSet obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: outs, self