message: fixing pylint error
  fixing pylint error according to:
diff: @@ -257,7 +257,10 @@ class Loop(training_utils.TrainingLoop):
  steps_name='steps_per_epoch',
  epochs=0)
  - steps_per_epoch = inferred_steps if steps_per_epoch is None else steps_per_epoch
  + steps_per_epoch = (
  + inferred_steps
  + if steps_per_epoch is None
  + else steps_per_epoch)
  training_dataset = strategy.experimental_distribute_dataset(
  training_dataset)
  