code: def test_close_no_hang_after_step(self):
      constructor = functools.partial(
          random_py_environment.RandomPyEnvironment,
          array_spec.ArraySpec((3, 3), np.float32),
          array_spec.BoundedArraySpec(
              [1], np.float32, minimum=-1.0, maximum=1.0
          ),
          episode_end_probability=0,
          min_duration=5,
          max_duration=5,
      )
      rng = np.random.RandomState()
      env = parallel_py_environment.ProcessPyEnvironment(constructor)
      env.start()
      action_spec = env.action_spec()
      env.reset()
      env.step(array_spec.sample_bounded_spec(action_spec, rng))
      env.step(array_spec.sample_bounded_spec(action_spec, rng))
      env.close()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import functools
  import time
  import numpy
  import tensorflow
  from tf_agents.environments import parallel_py_environment
  from tf_agents.environments import py_environment
  from tf_agents.environments import random_py_environment
  from tf_agents.specs import array_spec
  from tf_agents.system import system_multiprocessing
  from tf_agents.trajectories import time_step
label_desc: Use image node_id 2 for calling the ProcessPyEnvironmentTest obj's underlying member method code with example usage: obj.test_close_no_hang_after_step() without return types