code: def _set_default_specs(self):
      self.observation_spec = array_spec.ArraySpec((3, 3), np.float32)
      self.time_step_spec = ts.time_step_spec(self.observation_spec)
      self.action_spec = array_spec.BoundedArraySpec(
          [7], dtype=np.float32, minimum=-1.0, maximum=1.0
      )
  
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 1 for calling the ParallelPyEnvironmentTest obj's underlying member method code with example usage: obj._set_default_specs() without return types