16 Pull requests merged by 12 people

• Refactor returns in v3.0.0.d.py

  #6154 merged Jun 14, 2025

• Rename KernelParamsTensor to GPRegressor

  #6153 merged Jun 13, 2025

• Improve parallelization document

  #6123 merged Jun 13, 2025

• Refactor KernelParamsTensor towards cleaner GP-related modules

  #6152 merged Jun 13, 2025

• Fix README for blackdoc==0.3.10

  #6150 merged Jun 13, 2025

• Refactor return style #6136

  #6151 merged Jun 13, 2025

• Use hypervolume difference as upperbound of contribs in HSSP

  #6131 merged Jun 12, 2025

• Clean up GP-related docs

  #6125 merged Jun 12, 2025

• Bump up version number to v4.5.0.dev

  #6149 merged Jun 12, 2025

• Bump up version number to v4.4.0

  #6148 merged Jun 12, 2025

• [hotfix] Add version constraint on blackdoc

  #6145 merged Jun 11, 2025

• Refactor return statement style in optuna/storages/_rdb/models.py for consistency among the codebase

  #6143 merged Jun 9, 2025

• Simplify tuple return in test_trial.py

  #6141 merged Jun 9, 2025

• Simplify tuple return in optuna/visualization/_terminator_improvement.py

  #6139 merged Jun 9, 2025

• Refactor return standardization in optim_mixed.py

  #6140 merged Jun 9, 2025

• Fix CI

  #6137 merged Jun 9, 2025

1 Pull request opened by 1 person

• Use iterator for lazy evaluation in journal storage’s `read_logs`

  #6144 opened Jun 11, 2025

4 Issues closed by 3 people

• Remove the version constraint on blackdoc

  #6146 closed Jun 13, 2025

• `JSONDecodeError` in `JournalStorage`

  #5138 closed Jun 10, 2025

• Incompatible types when running mypy hook

  #6142 closed Jun 9, 2025

• BruteForceSampler fails to resume study when run fails

  #5097 closed Jun 8, 2025

1 Issue opened by 1 person

• Use `return a, b` instead of `return (a, b)`

  #6136 opened Jun 7, 2025

6 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Document Behavior of `optuna.pruners.PercentilePruner`, `optuna.pruners.SuccessiveHalvingPruner` and `optuna.pruners.HyperbandPruner`

  #6092 commented on Jun 13, 2025 • 3 new comments

• Fix: Resolve PG17 incompatibility for ENUMS in CASE statements

  #6099 commented on Jun 12, 2025 • 1 new comment

• Refactor `tell_with_warning` to avoid unnecessary `get_trial` call

  #6133 commented on Jun 12, 2025 • 1 new comment

• Add FAQ for case sensitivity problem with MySQL

  #6127 commented on Jun 7, 2025 • 0 new comments

• Cache split infromation for TPE sampler.

  #6128 commented on Jun 12, 2025 • 0 new comments

• Calculate hypervolume in HSSP using sum of contributions

  #6130 commented on Jun 13, 2025 • 0 new comments