Version 0.9.0

October 2021

• Fix skopt.learning.gaussian_process.gpr.GaussianProcessRegressor for sklearn >= 0.23.

• Change skip= parameter in skopt.sampler.sobol.Sobol initial point generator.

• Feature skopt.callbacks.HollowIterationsStopper callback.

• Feature skopt.callbacks.ThresholdStopper callback.

• Fix Fix skopt.searchcv.BayesSearchCV for scikit-learn >= 0.24.

• API Change Deprecate skopt.searchcv.BayesSearchCV parameter iid=.

• Fix NumPy deprecation errors.

• Fix issue with skopt.optimizer.optimizer.Optimizer not being garbage-collectable.

• Fix version check in skopt.learning.gaussian_process.gpr.GaussianProcessRegressor for scikit-learn >= 1.0.

• Minor documentation improvements.

• Various small bugs and fixes.