message: Update learning.py
  use sys.maxsize because sys.maxint doesn't exist in Python 3
diff: @@ -753,9 +753,10 @@ def train(train_op,
  if logdir:
  sv.start_standard_services(sess)
  elif startup_delay_steps > 0:
  + # (use sys.maxsize because sys.maxint doesn't exist in Python 3)
  _wait_for_step(sess, global_step,
  min(startup_delay_steps, number_of_steps or
  - sys.maxint))
  + sys.maxsize))
  threads = sv.start_queue_runners(sess)
  logging.info('Starting Queues.')
  if is_chief and sync_optimizer is not None:
  