code: def test_discrete_space(self):
      env = gym.make("CartPole-v1")
      d = gym_space_to_dict(env.action_space)
      sp = gym_space_from_dict(d)
  
      action_space = env.action_space
      self.assertEqual(sp.n, action_space.n)
  
imports: import unittest
  from collections import OrderedDict
  import gymnasium
  import numpy
  from ray.rllib.utils.serialization import convert_numpy_to_python_primitives, gym_space_from_dict, gym_space_to_dict, space_from_dict, space_to_dict
  from ray.rllib.utils.spaces.flexdict import FlexDict
  from ray.rllib.utils.spaces.repeated import Repeated
  from ray.rllib.utils.spaces.simplex import Simplex
label_desc: Use image node_id 2 for calling the TestGymCheckEnv obj's underlying member method code with example usage: obj.test_discrete_space() without return types