From 3150de99bc21bfb724d68ee1fa740efa37810799 Mon Sep 17 00:00:00 2001
From: attack68 <24256554+attack68@users.noreply.github.com>
Date: Tue, 3 Aug 2021 19:15:13 +0200
Subject: [PATCH] Backport PR #42839: BUG: `styler.hide_columns` now hides the
 index name header row

---
 doc/source/whatsnew/v1.3.2.rst              | 2 +-
 pandas/io/formats/style_render.py           | 1 +
 pandas/tests/io/formats/style/test_style.py | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/source/whatsnew/v1.3.2.rst b/doc/source/whatsnew/v1.3.2.rst
index 8723b1b766485..9b412d6d46c5e 100644
--- a/doc/source/whatsnew/v1.3.2.rst
+++ b/doc/source/whatsnew/v1.3.2.rst
@@ -31,7 +31,7 @@ Fixed regressions
 Bug fixes
 ~~~~~~~~~
 - 1D slices over extension types turn into N-dimensional slices over ExtensionArrays (:issue:`42430`)
--
+- :meth:`.Styler.hide_columns` now hides the index name header row as well as column headers (:issue:`42101`)
 
 .. ---------------------------------------------------------------------------
 
diff --git a/pandas/io/formats/style_render.py b/pandas/io/formats/style_render.py
index 616b89f9e519f..97a05329507c9 100644
--- a/pandas/io/formats/style_render.py
+++ b/pandas/io/formats/style_render.py
@@ -356,6 +356,7 @@ def _translate_header(
             self.data.index.names
             and com.any_not_none(*self.data.index.names)
             and not self.hide_index_
+            and not self.hide_columns_
         ):
             index_names = [
                 _element(
diff --git a/pandas/tests/io/formats/style/test_style.py b/pandas/tests/io/formats/style/test_style.py
index f2c2f673909d4..99c725ed8df69 100644
--- a/pandas/tests/io/formats/style/test_style.py
+++ b/pandas/tests/io/formats/style/test_style.py
@@ -1109,7 +1109,7 @@ def test_hide_column_headers(self):
 
         self.df.index.name = "some_name"
         ctx = self.df.style.hide_columns()._translate(True, True)
-        assert len(ctx["head"]) == 1  # only a single row for index names: no col heads
+        assert len(ctx["head"]) == 0  # no header for index names, changed in #42101
 
     def test_hide_single_index(self):
         # GH 14194