code: def test_is_pickleable(self):
      with tf.compat.v1.variable_scope("SimpleQFunction", reuse=True):
          return_var = tf.compat.v1.get_variable("return_var")
      # assign it to all one
      return_var.load(tf.ones_like(return_var).eval())
      obs = self.env.step(1).observation
      action1, _ = self.policy.get_action(obs)
  
      p = pickle.dumps(self.policy)
      with tf.compat.v1.Session(graph=tf.Graph()):
          policy_pickled = pickle.loads(p)
          action2, _ = policy_pickled.get_action(obs)
          assert action1 == action2
  
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 4 for calling the TestQfDerivedPolicy obj's underlying member method code with example usage: obj.test_is_pickleable() without return types