Shotaro Sano

Thanks @PhilipMay for reporting again and @hvy for analysis! As the problem still reproduces, let's reopen.

Since this issue has been open for a long time, let me close once. Feel free to reopen upon necessity.

Since this issue has been open for a long time, let me close once. Feel free to reopen upon necessity.

Sounds good. Actually, I was wondering which name I should adopt when creating #1613 . I summarized below the correspondence of the algorithm setting among the Goptuna, Optuna, and Hyperopt...

Hi, I'm one of the maintainers of Optuna. Thank you for referring to Optuna as a possible backend of the multi-objective API. As @c-bata mentions, Optuna supports several algorithms for...

Let me confirm the current target of this issue. We'll work on BOTH of the following changes; correct? - Changing the output format of `optuna studies` so that `user_attrs` by...

@nzw0301 Thanks for your clarification. This direction looks good to me. > at least for consistency with optuna trials and the current width of the output of optuna studies is...

Thanks @blazespinnaker for looking into this issue! I removed `ontribution-welcome` label just to keep the [CW list](https://github.com/optuna/optuna/issues?q=is%3Aissue+is%3Aopen+label%3Acontribution-welcome) with open, unstarted issues.

This issue is still open. One can start to work on it by removing ` @pytest.mark.skip(reason="Temporally skip due to unknown CatBoost error.")` in the same way as #3849 and see...

> the current behaviour is test raises no errors As far as we can see with [the CI results](https://github.com/optuna/optuna/pull/3849/checks) of #3849, CI fails depending on the Python environment. We need...