code: def test_greedy_actions(self):
      self.assertIsInstance(self.qout.greedy_actions, torch.Tensor)
      np.testing.assert_almost_equal(
          self.qout.greedy_actions.detach().cpu().numpy(),
          self.q_values.argmax(axis=1),
          decimal=5,
      )
  
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 4 for calling the TestDistributionalDiscreteActionValue obj's underlying member method code with example usage: obj.test_greedy_actions() without return types