contramundum53

Maybe we should make the error message more readable (with instructions to install the correct version of `botorch`), though.

@yancychy Thank you for your bug report! Hmm...I couldn't reproduce this error. (The above code worked normally, after setting url to my database.)

@yancychy Could you tell us what version of mysql you are using, and what DB driver you are using? (We test our code with PyMySQL.) Also could you tell us...

MyISAM doesn't seem to support transactions. Could you try using InnoDB?

Does PR #4352 solve this problem?

I think it is important for TPE algorithm to "see" the duplicate trials to converge to the desired solution. However, if you know that the objective function is deterministic, you...

@cowwoc No, optuna keeps all the history of previous evaluations, and #4352 simply searches the entire history for exact match. This is equivalent to X=infinity case.

This issue is still an issue.

I think we can make this issue contribution-welcome. We may need to care about the dependency on numpy 1.17. We could simply return `numpy.random.RandomState` when there is no `numpy.random.default_rng`.

How about writing a condition? @HideakiImamura I don't think we have any schedules to drop `numpy < 1.17` in the foreseeable future, and yet it's better for us to follow...