Abstract This package extends optuna.visualization.plot_slice so that it can also plot user attributes set by trial.set_user_attr. User attributes are useful for recording values that are not parameters, such as training time, the number of model parameters, or whether early stopping happened. With this package, you can check how such values relate to the objective value in the same figure as the parameters.
Without the user_attrs argument, the output is the same as optuna.