Use TYPE_CHECKING for typing-only imports in test_timeline.py#6451
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y0z merged 1 commit intooptuna:masterfrom Feb 18, 2026
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Summary
Move typing-only imports in
optuna/tests/visualization_tests/test_timeline.pyunderif TYPE_CHECKINGguard to prevent potential circular import issuesMotivation
TYPE_CHECKINGif necessary #6029Description of the changes
Added
from typing import TYPE_CHECKINGMoved
from collections.abc import Callable,import _pytest.capture, andfrom optuna.study.study import StudyunderTYPE_CHECKINGblock