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optuna-dashboard/optuna_dashboard/_named_objectives.py
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2023-04-27 17:13:54 +09:00

54 lines
1.6 KiB
Python

from __future__ import annotations
from typing import Any
from typing import Optional
import warnings
import optuna
# Should be equivalent to `optuna.study.study._SYSTEM_ATTR_METRIC_NAMES`.
# See https://github.com/optuna/optuna/pull/4383 for details.
SYSTEM_ATTR_METRIC_NAMES = "study:metric_names"
SYSTEM_ATTR_NAME = "dashboard:objective_names"
def set_objective_names(study: optuna.Study, names: list[str]) -> None:
"""Set the names of objectives.
Example:
.. code-block:: python
import optuna
from optuna_dashboard import set_objective_names
study = optuna.create_study(directions=["minimize", "minimize"])
set_objective_names(study, ["val_loss", "flops"])
"""
if hasattr(study, "set_metric_names"):
warnings.warn(
"`set_objective_names()` function is deprecated."
" Please use `study.set_metric_names()` instead."
" See https://optuna-dashboard.readthedocs.io/en/latest/errors.html for details.",
category=FutureWarning,
)
study.set_metric_names(names)
return
storage = study._storage
study_id = study._study_id
directions = storage.get_study_directions(study_id)
if len(directions) != len(names):
raise ValueError("names must be the same length with the number of objectives.")
storage.set_study_system_attr(study_id, SYSTEM_ATTR_NAME, names)
def get_objective_names(system_attrs: dict[str, Any]) -> Optional[list[str]]:
if SYSTEM_ATTR_METRIC_NAMES in system_attrs:
return system_attrs[SYSTEM_ATTR_METRIC_NAMES]
return system_attrs.get(SYSTEM_ATTR_NAME)