optuna.pruners.BasePruner

class optuna.pruners.BasePruner[source]

Base class for pruners.

Methods

prune(study, trial)

Judge whether the trial should be pruned based on the reported values.

abstractmethod prune(study, trial)[source]

Judge whether the trial should be pruned based on the reported values.

Note that this method is not supposed to be called by library users. Instead, optuna.trial.Trial.report() and optuna.trial.Trial.should_prune() provide user interfaces to implement pruning mechanism in an objective function.

Parameters:

study (optuna.study.Study) – Study object of the target study.
trial (optuna.trial.FrozenTrial) – FrozenTrial object of the target trial. Take a copy before modifying this object.

Returns:

A boolean value representing whether the trial should be pruned.

Return type:

bool