code: def __getitem__(self, index):
      ann = super().__getitem__(index)
      if not isinstance(ann["captions"], list):
          if self.templates:
              ann["objects"] = ann["captions"]
              ann["captions"] = [
                  random.choice(self.templates).format(obj)
                  for obj in ann["objects"].split(",")
              ]
          else:
              ann["objects"] = ann["captions"]
              ann["captions"] = [
                  random.choice(ann["objects"].split(","))
              ]
      ann["text_input"] = self.text_processor(
          random.choice(ann["captions"])
      )
      return ann
  
imports: import os, sys
  from collections import OrderedDict
  import random
  from lavis.datasets.datasets.base_dataset import BaseDataset
  from lavis.common.utils import is_serializable
  from PIL import Image
  import numpy
  from tqdm import tqdm
  import json
  import torch
  import copy
label_desc: Use image node_id 5 for calling the ShapenetCaptionDataset obj's underlying member method code with example usage: obj.__getitem__(index) and returns: ann