code: def __getitem__(self, index):
      data = {}
      if self.captions is not None:
          chosen = list(self.captions.keys())[index]
          caption = self.captions.get(chosen, None)
          if caption is None:
              caption = self.default_caption
          filename = self.root_dir / chosen
      else:
          filename = self.paths[index]
  
      if self.return_paths:
          data["path"] = str(filename)
  
      im = Image.open(filename)
      im = self.process_im(im)
      data["image"] = im
  
      if self.captions is not None:
          data["txt"] = caption
      else:
          data["txt"] = self.default_caption
  
      if self.postprocess is not None:
          data = self.postprocess(data)
  
      return data
  
imports: import json
  from pathlib import Path
  from typing import Dict
  import torch
  from datasets import load_dataset
  from einops import rearrange
  from ldm.util import instantiate_from_config
  from omegaconf import DictConfig, ListConfig
  from PIL import Image
  from torch.utils.data import Dataset
  from torchvision import transforms
label_desc: Use image node_id 3 for calling the FolderData obj's underlying member method code with example usage: obj.__getitem__(index) and returns: data