.. include:: _contributors.rst

.. currentmodule:: skopt

.. _changes_0_9:

Version 0.9.0
=============
**October 2021**

- |Fix| :obj:`skopt.learning.gaussian_process.gpr.GaussianProcessRegressor`
  for sklearn >= 0.23. :pr:`943`
- Change `skip=` parameter in :obj:`skopt.sampler.sobol.Sobol`
  initial point generator. :pr:`955`
- |Feature| :obj:`skopt.callbacks.HollowIterationsStopper` callback. :pr:`917`
- |Feature| :obj:`skopt.callbacks.ThresholdStopper` callback. :pr:`1000`
- |Fix| Fix :obj:`skopt.searchcv.BayesSearchCV` for scikit-learn >= 0.24.
  :pr:`988`
- |API| Deprecate :class:`skopt.searchcv.BayesSearchCV` parameter `iid=`.
  :pr:`988`
- |Fix| NumPy deprecation errors. :pr:`1023`
- |Fix| issue with :class:`skopt.optimizer.optimizer.Optimizer` not being
  garbage-collectable. :pr:`1029`
- |Fix| version check in
  :class:`skopt.learning.gaussian_process.gpr.GaussianProcessRegressor`
  for scikit-learn >= 1.0. :pr:`1063`
- Minor documentation improvements.
- Various small bugs and fixes.