code: def setUpClass(cls) -> None:
      ray.init()
  
imports: import unittest
  import gymnasium
  import numpy
  from gymnasium.spaces import Box, Discrete
  from rllib_bandit.bandit.bandit import BanditLinTSConfig, BanditLinUCBConfig
  from rllib_bandit.env.bandit_envs_discrete import SimpleContextualBandit
  import ray
  from ray.rllib.env import EnvContext
  from ray.rllib.utils.numpy import convert_to_numpy
  from ray.rllib.utils.test_utils import check, check_train_results, framework_iterator
label_desc: Use image node_id 1 for calling the TestBandits obj's underlying member method code with example usage: obj.setUpClass(cls) without return types