optuna.artifacts

The artifacts module provides the way to manage artifacts (output files) in Optuna.

`optuna.artifacts.FileSystemArtifactStore`	An artifact store for file systems.
`optuna.artifacts.Boto3ArtifactStore`	An artifact backend for Boto3.
`optuna.artifacts.GCSArtifactStore`	An artifact backend for Google Cloud Storage (GCS).
`optuna.artifacts.Backoff`	An artifact store's middleware for exponential backoff.
`optuna.artifacts.upload_artifact`	Upload an artifact to the artifact store.