code: def test_getitem(self):
      sliced = self.qout[:10]
      np.testing.assert_almost_equal(
          sliced.q_values.detach().cpu().numpy(),
          self.q_values[:10],
          decimal=5,
      )
      np.testing.assert_almost_equal(
          sliced.z_values, self.z_values, decimal=5
      )
      np.testing.assert_almost_equal(
          sliced.q_dist.detach().cpu().numpy(),
          self.atom_probs[:10],
          decimal=5,
      )
      self.assertEqual(sliced.n_actions, self.action_size)
      self.assertIs(
          sliced.q_values_formatter, self.qout.q_values_formatter
      )
  
imports: import unittest
  import numpy
  import pytest
  import torch
  from pfrl import action_value
  from pfrl.testing import torch_assert_allclose
label_desc: Use image node_id 9 for calling the TestDistributionalDiscreteActionValue obj's underlying member method code with example usage: obj.test_getitem() without return types