# _log_scalars --- :::ultralytics.yolo.utils.callbacks.tensorboard._log_scalars <br><br> # on_pretrain_routine_start --- :::ultralytics.yolo.utils.callbacks.tensorboard.on_pretrain_routine_start <br><br> # on_batch_end --- :::ultralytics.yolo.utils.callbacks.tensorboard.on_batch_end <br><br> # on_fit_epoch_end --- :::ultralytics.yolo.utils.callbacks.tensorboard.on_fit_epoch_end <br><br>