Optuna Examples

This page contains a list of example codes written with Optuna.

Simple Black-box Optimization

• Quadratic function

Examples with ML Libraries

• Scikit-learn
• Scikit-learn OptunaSearchCV
• Scikit-image
• Chainer
• ChainerMN
• Dask-ML
• LightGBM
• LightGBM Tuner
• CatBoost
• MXNet
• Gluon
• PyTorch
• PyTorch Ignite
• PyTorch Lightning
• XGBoost
• Tensorflow
• Tensorflow (eager)
• Keras
• FastAI V1
• FastAI V2
• AllenNLP
• AllenNLP (Jsonnet)
• SKORCH
• RAPIDS
• Haiku

An example where an objective function uses additional arguments

The following example demonstrates how to implement an objective function that uses additional arguments other than trial.

• Scikit-learn (callable class version)

Examples of Pruning

The following example demonstrates how to implement pruning logic with Optuna.

• Simple pruning (scikit-learn)

In addition, integration modules are available for the following libraries, providing simpler interfaces to utilize pruning.

• Pruning with Catalyst integration module
• Pruning with Catboost integration module
• Pruning with Chainer integration module
• Pruning with ChainerMN integration module
• Pruning with FastAI V1 integration module
• Pruning with FastAI V2 integration module
• Pruning with Keras integration module
• Pruning with LightGBM integration module
• Pruning with MXNet integration module
• Pruning with PyTorch integration module
• Pruning with PyTorch Ignite integration module
• Pruning with PyTorch Lightning integration module
• Pruning with Tensorflow integration module
• Pruning with XGBoost integration module
• Pruning with XGBoost integration module (cross validation, XGBoost.cv)

Examples of User-Defined Sampler

• SimulatedAnnealingSampler

Examples of Multi-Objective Optimization

• Optimization with BoTorch
• Optimization of MLP with PyTorch

Examples of Visualization

• Visualizing study

An example to enqueue trials with given parameter values

• Enqueuing trials with given parameters

Examples of MLflow

• Tracking optimization process with MLflow

Examples of Hydra

• Optimization with Hydra

Examples of Distributed Optimization

• Optimizing on Kubernetes

Examples of Reinforcement Learning

• Optimization of Hyperparameters for Stable-Baslines Agent

External projects using Optuna

• Allegro Trains
• BBO-Rietveld: Automated crystal structure refinement
• Catalyst
• CuPy
• Hydra's Optuna Sweeper plugin
• Mozilla Voice STT
• neptune.ai
• OptGBM: A scikit-learn compatible LightGBM estimator with Optuna
• PyKEEN
• RL Baselines Zoo

PRs to add additional projects welcome!

Running with Optuna's Docker images?

You can use our docker images with the tag ending with -dev to run most of the examples. For example, you can run PyTorch Simple via docker run --rm optuna/optuna:py3.7-dev python examples/pytorch/pytorch_simple.py. Also, you can try our visualization example in Jupyter Notebook by opening localhost:8888 in your browser after executing this:

docker run -p 8888:8888 --rm optuna/optuna:py3.7-dev jupyter notebook --allow-root --no-browser --port 8888 --ip 0.0.0.0 --NotebookApp.token='' --NotebookApp.password=''