From 08e87d859f1999f722654d83d59fb9b6e1a2af0f Mon Sep 17 00:00:00 2001
From: "JHM Darbyshire (iMac)" <attack68@users.noreply.github.com>
Date: Sat, 18 Sep 2021 16:20:02 +0200
Subject: [PATCH 1/2] fix bug

---
 pandas/io/formats/style_render.py             | 39 ++++++++++---------
 .../tests/io/formats/style/test_to_latex.py   |  2 +-
 2 files changed, 21 insertions(+), 20 deletions(-)

diff --git a/pandas/io/formats/style_render.py b/pandas/io/formats/style_render.py
index 0ec6a9b470b50..94df9e36f89f7 100644
--- a/pandas/io/formats/style_render.py
+++ b/pandas/io/formats/style_render.py
@@ -621,28 +621,29 @@ def _translate_latex(self, d: dict) -> None:
         ]
         body = []
         for r, row in enumerate(d["body"]):
-            if all(self.hide_index_):
-                row_body_headers = []
-            else:
-                row_body_headers = [
-                    {
-                        **col,
-                        "display_value": col["display_value"]
-                        if col["is_visible"]
-                        else "",
-                        "cellstyle": self.ctx_index[r, c] if col["is_visible"] else [],
-                    }
+            if r not in self.hidden_rows:
+                if all(self.hide_index_):
+                    row_body_headers = []
+                else:
+                    row_body_headers = [
+                        {
+                            **col,
+                            "display_value": col["display_value"]
+                            if col["is_visible"]
+                            else "",
+                            "cellstyle": self.ctx_index[r, c],
+                        }
+                        for c, col in enumerate(row)
+                        if col["type"] == "th"
+                    ]
+
+                row_body_cells = [
+                    {**col, "cellstyle": self.ctx[r, c - self.data.index.nlevels]}
                     for c, col in enumerate(row)
-                    if col["type"] == "th"
+                    if (col["is_visible"] and col["type"] == "td")
                 ]
 
-            row_body_cells = [
-                {**col, "cellstyle": self.ctx[r, c - self.data.index.nlevels]}
-                for c, col in enumerate(row)
-                if (col["is_visible"] and col["type"] == "td")
-            ]
-
-            body.append(row_body_headers + row_body_cells)
+                body.append(row_body_headers + row_body_cells)
         d["body"] = body
 
     def format(
diff --git a/pandas/tests/io/formats/style/test_to_latex.py b/pandas/tests/io/formats/style/test_to_latex.py
index 40ba3ca26afa4..2e28e0925ac38 100644
--- a/pandas/tests/io/formats/style/test_to_latex.py
+++ b/pandas/tests/io/formats/style/test_to_latex.py
@@ -752,7 +752,7 @@ def test_apply_map_header_render_mi(df_ext, index, columns, siunitx):
     expected_index = dedent(
         """\
     \\multirow[c]{2}{*}{\\bfseries{A}} & a & 0 & -0.610000 & ab \\\\
-     & b & 1 & -1.220000 & cd \\\\
+    \\bfseries{} & b & 1 & -1.220000 & cd \\\\
     B & \\bfseries{c} & 2 & -2.220000 & de \\\\
     """
     )

From cd4a624d8a5f33b53c8c00c48ea23b4bc8df6bdd Mon Sep 17 00:00:00 2001
From: "JHM Darbyshire (iMac)" <attack68@users.noreply.github.com>
Date: Wed, 20 Oct 2021 18:04:14 +0200
Subject: [PATCH 2/2] add functionality

---
 pandas/io/formats/style_render.py              | 2 +-
 pandas/tests/io/formats/style/test_to_latex.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pandas/io/formats/style_render.py b/pandas/io/formats/style_render.py
index 2c862f2f4ed96..27a5170e48949 100644
--- a/pandas/io/formats/style_render.py
+++ b/pandas/io/formats/style_render.py
@@ -740,7 +740,7 @@ def _translate_latex(self, d: dict) -> None:
                         "display_value": col["display_value"]
                         if col["is_visible"]
                         else "",
-                        "cellstyle": self.ctx_index[r, c] if col["is_visible"] else [],
+                        "cellstyle": self.ctx_index[r, c],
                     }
                     for c, col in enumerate(row[:index_levels])
                     if (col["type"] == "th" and not self.hide_index_[c])
diff --git a/pandas/tests/io/formats/style/test_to_latex.py b/pandas/tests/io/formats/style/test_to_latex.py
index 5ebe5bc101c6b..f513b0d8a197e 100644
--- a/pandas/tests/io/formats/style/test_to_latex.py
+++ b/pandas/tests/io/formats/style/test_to_latex.py
@@ -840,7 +840,7 @@ def test_latex_hiding_index_columns_multiindex_alignment():
         i-0 & i-2 &  &  &  \\\\
         i0 & \\color{blue} j2 & \\color{red} 5 & 6 & 7 \\\\
         \\multirow[c]{2}{*}{\\color{blue} j0} & i2 & 9 & 10 & 11 \\\\
-         & \\color{blue} j2 & 13 & 14 & 15 \\\\
+        \\color{blue}  & \\color{blue} j2 & 13 & 14 & 15 \\\\
         \\end{tabular}
         """
     )