code: def test_parse_trajectory_file_name(self):
      self.assertEqual(
          (12, 13, 1.0, "abc"),
          trajectory.BatchTrajectory.parse_trajectory_file_name(
              "/tmp/trajectory_epoch_000012_env_id_000013_temperature_1.0_r_abc.pkl"
          ),
      )
  
      self.assertIsNone(
          trajectory.BatchTrajectory.parse_trajectory_file_name(
              "/tmp/trajectory_epoch_000012_env_id_000013.pkl"
          )
      )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import numpy
  from tensor2tensor.envs import time_step
  from tensor2tensor.envs import trajectory
  import tensorflow.compat.v1
  from tensorflow.compat.v1.io import gfile
label_desc: Use image node_id 10 for calling the BatchTrajectoryTest obj's underlying member method code with example usage: obj.test_parse_trajectory_file_name() without return types