class_docstr: Basically a list of TimeSteps with convenience methods.
class_docstr_tok: ["Basically","a","list","of","TimeSteps","with","convenience","methods","."]
code: def __init__(self, time_steps=None):
      # Contains a list of time steps.
      if time_steps is None:
          self._time_steps = []
      else:
          self._time_steps = time_steps
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import pickle
  import re
  import sys
  import time
  from absl import logging
  import cloudpickle
  import numpy
  from tensor2tensor.envs import time_step
  import tensorflow.compat.v1
label_desc: Use image node_id 1 to create a new Trajectory object from inherited base classes: object with example: obj = Trajectory(time_steps)