code: def __getitem__(self, key):
      return key, np.ones((3, 224, 224)), np.ones((10,))
  
imports: import sys
  import os
  import numpy
  import mxnet
  import pytest
  from mxnet.test_utils import rand_ndarray, assert_almost_equal
  from mxnet import gluon, context, use_np
  from mxnet.gluon import nn
  from mxnet.test_utils import *
  import itertools
label_desc: Use image node_id 2 for calling the Dummy obj's underlying member method code with example usage: obj.__getitem__(key) and returns: key,  np,  np