Cannot import UtilityFunction

[DorianP-cmd]

Hello!
I encountered this error, that I cannot import the UtilityFuntion.

"ImportError: cannot import name 'UtilityFunction' from 'bayes_opt.util' (C:\Users\doria\AppData\Roaming\Python\Python313\site-packages\bayes_opt\util.py)"

Is it not available on version 1.0.1 or was it moved somewhere?

Thanks in advance

[till-m]

Hi @DorianP-cmd,

the function exists in util.py in v1.0.1. Link.

Are you sure you're using v1.0.1? It's a very old release.

[till-m]

I assume the problem is fixed. Feel free to re-open if you encounter it again.

[SeiDPierre]

Hello, I have the same issue. I installed with pip. I checked for the class in util.py but could not find it...
I have version 2.0.3.
Thanks in advance,
Pierre

[SeiDPierre]

It looks like it was removed when the API changed during July of 2024: a6697aa

[till-m]

Hey @SeiDPierre,

this is indeed the case. You can install an older version (pre 2.0 should be fine). Why do you need the UtilityFunction? Are you using a package that depends on bayesian-optimization? If yes, the package should have it's dependencies defined including the version.

[SeiDPierre]

In deed, I had a look at version just before 2 and everything I need is there. I agree with you regarding versioning héhé. I'm just dealing with a new project that need some serious cleaning. Thanks for your reply.