From 9216c6b5a15100538ecfbd35e01e1b690b7b7bd9 Mon Sep 17 00:00:00 2001
From: "JHM Darbyshire (iMac)" <attack68@users.noreply.github.com>
Date: Tue, 11 Aug 2020 08:42:58 +0200
Subject: [PATCH 1/2] BUG: Styler cell_ids fails on multiple renders

---
 pandas/io/formats/style.py            | 14 +++++++-------
 pandas/tests/io/formats/test_style.py |  5 ++++-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/pandas/io/formats/style.py b/pandas/io/formats/style.py
index 584f42a6cab12..3bbb5271bce61 100644
--- a/pandas/io/formats/style.py
+++ b/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)
 
diff --git a/pandas/tests/io/formats/test_style.py b/pandas/tests/io/formats/test_style.py
index 3ef5157655e78..6025649e9dbec 100644
--- a/pandas/tests/io/formats/test_style.py
+++ b/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
 
 

From 30d1f7f61991f2827841338832493ef103373c17 Mon Sep 17 00:00:00 2001
From: "JHM Darbyshire (iMac)" <attack68@users.noreply.github.com>
Date: Fri, 14 Aug 2020 08:45:47 +0200
Subject: [PATCH 2/2] add to whats new

---
 doc/source/whatsnew/v1.1.1.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/source/whatsnew/v1.1.1.rst b/doc/source/whatsnew/v1.1.1.rst
index 98d67e930ccc0..3f177b29d52b8 100644
--- a/doc/source/whatsnew/v1.1.1.rst
+++ b/doc/source/whatsnew/v1.1.1.rst
@@ -33,7 +33,7 @@ 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
 ^^^^^^^^^^^