code: def setUpClass(cls):
      ray.init(num_cpus=1)
  
imports: import unittest
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.env.multi_agent_env import MultiAgentEnv
  from ray.rllib.evaluation.rollout_worker import RolloutWorker
  from ray.rllib.examples.env.mock_env import MockEnv3
  from ray.rllib.policy import Policy
  from ray.rllib.utils import override
label_desc: Use image node_id 1 for calling the TestEpisodeV2 obj's underlying member method code with example usage: obj.setUpClass(cls) without return types