code: def test_discrete_qf_argmax_policy(self):
      obs = self.env.step(1).observation
      action, _ = self.policy.get_action(obs)
      assert self.env.action_space.contains(action)
      actions, _ = self.policy.get_actions([obs])
      for action in actions:
          assert self.env.action_space.contains(action)
  
imports: import pickle
  import pytest
  import tensorflow
  from garage.envs import GymEnv
  from garage.envs.wrappers import AtariEnv
  from garage.tf.policies import DiscreteQFArgmaxPolicy
  from garage.tf.q_functions import DiscreteCNNQFunction
  from tests.fixtures import TfGraphTestCase
  from tests.fixtures.envs.dummy import DummyDictEnv, DummyDiscreteEnv, DummyDiscretePixelEnvBaselines
  from tests.fixtures.q_functions import SimpleQFunction
label_desc: Use image node_id 2 for calling the TestQfDerivedPolicy obj's underlying member method code with example usage: obj.test_discrete_qf_argmax_policy() without return types