Use scientific notation for best error in logger output (#1498)

Copilot · thinkall · web-flow · commit 7ac076d54453 · 2026-01-21T09:06:19.000+08:00
* Initial plan

* Change best error format from .4f to .4e for scientific notation

Co-authored-by: thinkall &lt;3197038+thinkall@users.noreply.github.com&gt;

---------

Co-authored-by: copilot-swe-agent[bot] &lt;198982749+Copilot@users.noreply.github.com&gt;
Co-authored-by: thinkall &lt;3197038+thinkall@users.noreply.github.com&gt;
Co-authored-by: Li Jiang &lt;bnujli@gmail.com&gt;
diff --git a/flaml/automl/automl.py b/flaml/automl/automl.py
@@ -3015,7 +3015,7 @@ def _search_sequential(self):
                     )
 
                 logger.info(
-                    " at {:.1f}s,\testimator {}'s best error={:.4f},\tbest estimator {}'s best error={:.4f}".format(
+                    " at {:.1f}s,\testimator {}'s best error={:.4e},\tbest estimator {}'s best error={:.4e}".format(
                         self._state.time_from_start,
                         estimator,
                         search_state.best_loss,

Original file line number	Diff line number	Diff line change
`@@ -3015,7 +3015,7 @@ def _search_sequential(self):`
`3015`	`3015`	`)`
`3016`	`3016`
`3017`	`3017`	`logger.info(`
`3018`		`- " at {:.1f}s,\testimator {}'s best error={:.4f},\tbest estimator {}'s best error={:.4f}".format(`
	`3018`	`+ " at {:.1f}s,\testimator {}'s best error={:.4e},\tbest estimator {}'s best error={:.4e}".format(`
`3019`	`3019`	`self._state.time_from_start,`
`3020`	`3020`	`estimator,`
`3021`	`3021`	`search_state.best_loss,`