code: def test_get_param(self):
      with tf.compat.v1.variable_scope("SimpleQFunction", reuse=True):
          return_var = tf.compat.v1.get_variable("return_var")
      assert self.policy.get_param_values() == return_var.eval()
  
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 3 for calling the TestQfDerivedPolicy obj's underlying member method code with example usage: obj.test_get_param() without return types