Backport PR #35664: BUG: Styler cell_ids fails on multiple renders (#35722)

Co-authored-by: attack68 <[email protected]>

Author: meeseeksmachine

doc/source/whatsnew/v1.1.1.rst

@@ -34,7 +34,7 @@ Fixed regressions
 Bug fixes
 ~~~~~~~~~
 
-- Bug in ``Styler`` whereby `cell_ids` argument had no effect due to other recent changes (:issue:`35588`).
+- Bug in ``Styler`` whereby `cell_ids` argument had no effect due to other recent changes (:issue:`35588`) (:issue:`35663`).
 
 Categorical
 ^^^^^^^^^^^

pandas/io/formats/style.py

@@ -390,16 +390,16 @@ def format_attr(pair):
                     "is_visible": (c not in hidden_columns),
                 }
                 # only add an id if the cell has a style
+                props = []
                 if self.cell_ids or (r, c) in ctx:
                     row_dict["id"] = "_".join(cs[1:])
+                    for x in ctx[r, c]:
+                        # have to handle empty styles like ['']
+                        if x.count(":"):
+                            props.append(tuple(x.split(":")))
+                        else:
+                            props.append(("", ""))
                 row_es.append(row_dict)
-                props = []
-                for x in ctx[r, c]:
-                    # have to handle empty styles like ['']
-                    if x.count(":"):
-                        props.append(tuple(x.split(":")))
-                    else:
-                        props.append(("", ""))
                 cellstyle_map[tuple(props)].append(f"row{r}_col{c}")
             body.append(row_es)
 

pandas/tests/io/formats/test_style.py

@@ -1684,8 +1684,11 @@ def f(a, b, styler):
 
     def test_no_cell_ids(self):
         # GH 35588
+        # GH 35663
         df = pd.DataFrame(data=[[0]])
-        s = Styler(df, uuid="_", cell_ids=False).render()
+        styler = Styler(df, uuid="_", cell_ids=False)
+        styler.render()
+        s = styler.render()  # render twice to ensure ctx is not updated
         assert s.find('<td  class="data row0 col0" >') != -1