optuna.integration.WeightsAndBiasesCallback¶
-
class
optuna.integration.
WeightsAndBiasesCallback
(metric_name='value', wandb_kwargs=None)[source]¶ Callback to track Optuna trials with Weights & Biases.
This callback enables tracking of Optuna study in Weights & Biases. The study is tracked as a single experiment run, where all suggested hyperparameters and optimized metrics are logged and plotted as a function of optimizer steps.
Note
User needs to be logged in to Weights & Biases before using this callback in online mode. For more information, please refer to wandb setup.
Note
Users who want to run multiple Optuna studies within the same process should call
wandb.finish()
between subsequent calls tostudy.optimize()
. Callingwandb.finish()
is not necessary if you are running one Optuna study per process.Note
To ensure correct trial order in Weights & Biases, this callback should only be used with
study.optimize(n_jobs=1)
.Example
Add Weights & Biases callback to Optuna optimization.
import optuna from optuna.integration.wandb import WeightsAndBiasesCallback def objective(trial): x = trial.suggest_float("x", -10, 10) return (x - 2) ** 2 wandb_kwargs = {"project": "my-project"} wandbc = WeightsAndBiasesCallback(wandb_kwargs=wandb_kwargs) study = optuna.create_study(study_name="my_study") study.optimize(objective, n_trials=10, callbacks=[wandbc])
- Parameters
metric_name – Name assigned to optimized metric. In case of multi-objective optimization, list of names can be passed. Those names will be assigned to metrics in the order returned by objective function. If single name is provided, or this argument is left to default value, it will be broadcasted to each objective with a number suffix in order returned by objective function e.g. two objectives and default metric name will be logged as
value_0
andvalue_1
.wandb_kwargs – Set of arguments passed when initializing Weights & Biases run. Please refer to Weights & Biases API documentation for more details.
- Raises
ValueError – If there are missing or extra metric names in multi-objective optimization.
TypeError – When metric names are not passed as sequence.
Note
Added in v2.9.0 as an experimental feature. The interface may change in newer versions without prior notice. See https://github.com/optuna/optuna/releases/tag/v2.9.0.