Version 0.9.0

October 2021

• Fix skopt.learning.gaussian_process.gpr.GaussianProcessRegressor for sklearn >= 0.23. #943

• Change skip= parameter in skopt.sampler.sobol.Sobol initial point generator. #955

• Feature skopt.callbacks.HollowIterationsStopper callback. #917

• Feature skopt.callbacks.ThresholdStopper callback. #1000

• Fix Fix skopt.searchcv.BayesSearchCV for scikit-learn >= 0.24. #988

• API Change Deprecate skopt.searchcv.BayesSearchCV parameter iid=. #988

• Fix NumPy deprecation errors. #1023

• Fix issue with skopt.optimizer.optimizer.Optimizer not being garbage-collectable. #1029

• Fix version check in skopt.learning.gaussian_process.gpr.GaussianProcessRegressor for scikit-learn >= 1.0. #1063

• Minor documentation improvements.

• Various small bugs and fixes.