code: def item_handler(self, request: Request, idx: str):
      sample = self.dataset[int(idx)]
  
      sample = pickle.dumps(sample)
      return Response(sample, media_type="binary/pickle")
  
file_path: labml/helpers/labml_helpers/datasets/remote/server.py
imports: import pickle
  import uvicorn
  from fastapi import FastAPI, Request, Response
  from torch.utils.data import Dataset
label_desc: Use image node_id 3 for calling the _ServerDataset obj's underlying member method code with example usage: obj.item_handler(request, idx) and returns: Response