optuna.visualization.plot_timeline

optuna.visualization.plot_timeline(study)[source]

Plot the timeline of a study.

Example

The following code snippet shows how to plot the timeline of a study. Timeline plot can visualize trials with overlapping execution time (e.g., in distributed environments).

import time

import optuna


def objective(trial):
    x = trial.suggest_float("x", 0, 1)
    time.sleep(x * 0.1)
    if x > 0.8:
        raise ValueError()
    if x > 0.4:
        raise optuna.TrialPruned()
    return x ** 2


study = optuna.create_study(direction="minimize")
study.optimize(
    objective, n_trials=50, n_jobs=2, catch=(ValueError,)
)

fig = optuna.visualization.plot_timeline(study)
fig.show()

Parameters:: study (Study) – A Study object whose trials are plotted with their lifetime.
Returns:: A plotly.graph_objects.Figure object.
Return type:: Figure

Note

Added in v3.2.0 as an experimental feature. The interface may change in newer versions without prior notice. See https://github.com/optuna/optuna/releases/tag/v3.2.0.