code: def setUp(self):
      super(RandomPyPolicyTest, self).setUp()
      self._time_step_spec = time_step.time_step_spec(
          observation_spec=array_spec.ArraySpec((1,), np.int32)
      )
      self._time_step = time_step.restart(observation=np.array([1]))
  
file_path: agents/tf_agents/policies/random_py_policy_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import numpy
  import tensorflow
  from tf_agents.policies import random_py_policy
  from tf_agents.specs import array_spec
  from tf_agents.trajectories import time_step
  from tf_agents.utils import test_utils
label_desc: Use image node_id 1 for calling the RandomPyPolicyTest obj's underlying member method code with example usage: obj.setUp() without return types