code: def test_getitem(self):
      sliced = self.av[:10]
      torch_assert_allclose(sliced.q_values, self.q_values[:10])
      torch_assert_allclose(sliced.quantiles, self.quantiles[:10])
      self.assertEqual(sliced.n_actions, self.action_size)
      self.assertIs(
          sliced.q_values_formatter, self.av.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 5 for calling the TestQuantileDiscreteActionValue obj's underlying member method code with example usage: obj.test_getitem() without return types