class_docstr: Tests for timeline
code: def __init__(self, *args, **kwargs):
      super(TimelineTests, self).__init__(*args, **kwargs)
      warnings.simplefilter("module")
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import time
  import threading
  import unittest
  import warnings
  import torch
  import bluefog.torch
  from bluefog.common import topology_util
  from bluefog.common.util import env
label_desc: Use image node_id 1 to create a new TimelineTests object from inherited base classes: unittest with example: obj = TimelineTests()