code: def __getitem__(self, idx):
      return self.input_ids[idx], self.attn_masks[idx]
  
file_path: ColossalAI/examples/language/opt/data.py
imports: import torch
  from datasets import load_dataset
  from torch.utils.data import Dataset
label_desc: Use image node_id 3 for calling the NetflixDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: self,  self