code: def __getitem__(self, *args):
      return torch.ones(2)
  
imports: import os
  import shutil
  import pytest
  import torch
  from omegaconf import OmegaConf
  from pytorch_lightning import Trainer
  from nemo.core import ModelPT
  from nemo.utils import logging
  from nemo.utils.exp_manager import CallbackParams, ExpManagerConfig, StatelessTimer, exp_manager
label_desc: Use image node_id 2 for calling the OnesDataset obj's underlying member method code with example usage: obj.__getitem__() and returns: torch