class_docstr: Dataset loader for Libsvm data format 
class_docstr_tok: ["Dataset","loader","for","Libsvm","data","format"]
code: def __getitem__(self, idx):
      return {
          "id": self.feat_id[idx],
          "value": self.feat_value[idx],
          "y": self.y[idx],
      }
  
imports: import calendar
  import os
  import time
  import requests
  import json
  from typing import List, Dict
  import traceback
  import orjson
  from argparse import Namespace
  from shared_config import parse_config_arguments
  from torch.utils.data import Dataset
  import torch
label_desc: Use image node_id 5 for calling the LibsvmDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: dict