Update pandas/core/series.py

samukweku · yuanx749 · web-flow · commit bdc54f62fb92 · 2023-12-25T22:21:26.000+11:00
Co-authored-by: Xiao Yuan &lt;yuanx749@gmail.com&gt;
diff --git a/pandas/core/series.py b/pandas/core/series.py
@@ -5702,7 +5702,7 @@ def case_when(
                 f"The caselist argument should be a list; instead got {type(caselist)}"
             )
 
-        if not len(caselist):
+        if not caselist:
             raise ValueError(
                 "provide at least one boolean condition, "
                 "with a corresponding replacement."

Original file line number	Diff line number	Diff line change
`@@ -5702,7 +5702,7 @@ def case_when(`
`5702`	`5702`	`f"The caselist argument should be a list; instead got {type(caselist)}"`
`5703`	`5703`	`)`
`5704`	`5704`
`5705`		`- if not len(caselist):`
	`5705`	`+ if not caselist:`
`5706`	`5706`	`raise ValueError(`
`5707`	`5707`	`"provide at least one boolean condition, "`
`5708`	`5708`	`"with a corresponding replacement."`