code: def __getitem__(self, i):
      return np.zeros([100, 200, 3]), np.arange(20)[i]
  
imports: from unittest import TestCase
  import jax.numpy
  import numpy
  import optax
  import pytest
  import elegy
label_desc: Use image node_id 2 for calling the DS0 obj's underlying member method code with example usage: obj.__getitem__(i) and returns: np,  np