code: def test_obs_unflattened(
      self, filters, strides, padding, hidden_sizes
  ):
      self.policy = CategoricalCNNPolicy(
          env_spec=self.env.spec,
          filters=filters,
          strides=strides,
          padding=padding,
          hidden_sizes=hidden_sizes,
      )
      obs = self.env.observation_space.sample()
      action, _ = self.policy.get_action(
          self.env.observation_space.flatten(obs)
      )
      self.env.step(action)
  
file_path: garage/tests/garage/tf/policies/test_categorical_cnn_policy.py
imports: import pickle
  from unittest import mock
  import numpy
  import pytest
  import tensorflow
  from garage.envs import GymEnv
  from garage.tf.policies import CategoricalCNNPolicy
  from tests.fixtures import TfGraphTestCase
  from tests.fixtures.envs.dummy import DummyDictEnv, DummyDiscretePixelEnv
label_desc: Use image node_id 2 for calling the TestCategoricalCNNPolicyImageObs obj's underlying member method code with example usage: obj.test_obs_unflattened(filters, strides, padding, hidden_sizes) without return types