code: def test_simplex_space(self):
      space = Simplex(shape=(3, 4), concentration=np.array((1, 2, 1)))
  
      d = gym_space_to_dict(space)
      sp = gym_space_from_dict(d)
  
      _assert_array_equal(self.assertEqual, space.shape, sp.shape)
      _assert_array_equal(
          self.assertAlmostEqual, space.concentration, sp.concentration
      )
      self.assertEqual(space.dtype, sp.dtype)
  
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 8 for calling the TestGymCheckEnv obj's underlying member method code with example usage: obj.test_simplex_space() without return types