code: def __getitem__(self, index):
      ex = self.examples[index]
      return ex.text, ex.code, ex.idx
  
imports: import json
  import torch
  from torch.utils.data import DataLoader, Dataset
label_desc: Use image node_id 3 for calling the cosqa_search_train obj's underlying member method code with example usage: obj.__getitem__(index) and returns: ex,  ex,  ex