message: constant learning rate logging added to TensorBoard callback
diff: @@ -2440,6 +2440,8 @@ class TensorBoard(Callback, version_utils.TensorBoardVersionSelector):
  lr_schedule = getattr(self.model.optimizer, 'lr', None)
  if isinstance(lr_schedule, learning_rate_schedule.LearningRateSchedule):
  logs['learning_rate'] = lr_schedule(self.model.optimizer.iterations)
  + elif lr_schedule is not None:
  + logs['learning_rate'] = lr_schedule
  return logs
  def _compute_steps_per_second(self):
  