PERF: Styler (pandas-dev#43285)

jbrockmendel · feefladder · commit 33532571c1cd · 2021-09-07T07:54:12.000+02:00
diff --git a/pandas/io/formats/style.py b/pandas/io/formats/style.py
@@ -1023,7 +1023,8 @@ def _update_ctx(self, attrs: DataFrame) -> None:
             )
 
         for cn in attrs.columns:
-            for rn, c in attrs[[cn]].itertuples():
+            ser = attrs[cn]
+            for rn, c in ser.items():
                 if not c or pd.isna(c):
                     continue
                 css_list = maybe_convert_css_to_tuples(c)

Original file line number	Diff line number	Diff line change
`@@ -1023,7 +1023,8 @@ def _update_ctx(self, attrs: DataFrame) -> None:`
`1023`	`1023`	`)`
`1024`	`1024`
`1025`	`1025`	`for cn in attrs.columns:`
`1026`		`- for rn, c in attrs[[cn]].itertuples():`
	`1026`	`+ ser = attrs[cn]`
	`1027`	`+ for rn, c in ser.items():`
`1027`	`1028`	`if not c or pd.isna(c):`
`1028`	`1029`	`continue`
`1029`	`1030`	`css_list = maybe_convert_css_to_tuples(c)`