code: def run_at_frame_rate(self, fps):
      env = deepmind_lab.Lab(
          "tests/episode_time_test",
          ["EPISODE_TIME_SECONDS"],
          config={"fps": str(fps), "width": "32", "height": "32"},
      )
  
      env.reset()
      nop = np.zeros((7,), dtype=np.intc)
  
      for _ in six.moves.range(0, fps):
          env.step(nop, 1)
  
      obs = env.observations()
      self.assertEqual(obs["EPISODE_TIME_SECONDS"][0], 1.0)
  
file_path: lab/python/tests/episode_time_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl.testing import absltest
  import numpy
  import six
  import deepmind_lab
label_desc: Use image node_id 1 for calling the EpisodeTimeTest obj's underlying member method code with example usage: obj.run_at_frame_rate(fps) without return types