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### Motivation
Genetic Algorithm (GA) is a popular metaheuristic algorithm inspired by natural selection.
This issue proposes to add a GA-based sampler to OptunaHub.
We want to start the most st…
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### Expected behavior
Optuna optimization executed on sklearn `Pipeline` with _multiple_ `ColumnTransformer`s crashes when `n_jobs` ≠ 1 and the `transformers` argument of `ColumnTransformer`s refer…
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### Motivation
As far as I can tell, it is not possible yet to use the `enqueue_trial` function alongside the ask-and-tell interface. I would like to supply an initial set of parameters to use for …
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### Expected behavior
When using the PyTorchLightningPruningCallback a pruned trial should resolve without errors.
### Environment
- Optuna version:3.2.0
- Python version:3.8.10
- OS:Linux-5.4.0-…
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Basically, at the end of the day we pass into XGBoost a list of features that are allowed. These are normally cross-products across window sizes specified via a list from a set of options sampled by O…
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### Expected behavior
When running a study using BruteForceSampler, if any run fails (for example for out of memory errors) and the study is interrupted before completion of all the possible trials…
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Problem: _catboost.CatBoostError: catboost/private/libs/algo/tensor_search_helpers.cpp:99: This should be unreachable
catboost version: 1.1.1
Operating System: Windows 11
CPU: appnode (360GB)
GPU:…
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# 🚀 Feature Request
I would like to make use of the `constant_liar` parameter of [TPESampler](https://optuna.readthedocs.io/en/stable/reference/generated/optuna.samplers.TPESampler.html) which was …
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Context in #1377
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### Motivation
`Study._optimize_sequential` encounters an issue if `_run_trial` errors and callbacks are present, as seen in the following relevant code block:
```python
try:
…
lumip updated
2 months ago