Learning rate scheduler.
callback_learning_rate_scheduler(schedule)a function that takes an epoch index as input (integer, indexed from 0) and returns a new learning rate as output (float).
Other callbacks: callback_csv_logger,
callback_early_stopping,
callback_lambda,
callback_model_checkpoint,
callback_progbar_logger,
callback_reduce_lr_on_plateau,
callback_remote_monitor,
callback_tensorboard,
callback_terminate_on_naan