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[python-package] add test for early stopping via params in cv() - #7504
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GopiChoudhary19 wants to merge 1 commit into
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GopiChoudhary19
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borchero,
guolinke,
jameslamb,
jmoralez,
mayer79 and
shiyu1994
as code owners
October 25, 2026 18:46
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it contributes to #7031 , the checklist item "engine.cv(): adding early_stopping() based on the presence of early_stopping_round in params". it runs lgb.cv() with early_stopping_round: 2 and metric that never improves. It checks that training stops after the first iteration. it then runs again without the parameter and checks that all 10 rounds are kept. Alias handling is covered too(early_stopping_round and n_iter_no_change). I ran the new test, and the existing early-stopping and test_cv test, against current main, and they pass.