From e4145d45b1604aae226cb2d3b420250911f11dc9 Mon Sep 17 00:00:00 2001
From: Zhengbo Wang <77875500+luke396@users.noreply.github.com>
Date: Tue, 6 Feb 2024 11:51:00 +0800
Subject: [PATCH 1/4] Add doc and codes

---
 doc/source/user_guide/categorical.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/doc/source/user_guide/categorical.rst b/doc/source/user_guide/categorical.rst
index 8fb991dca02db..b5640c5d83e6c 100644
--- a/doc/source/user_guide/categorical.rst
+++ b/doc/source/user_guide/categorical.rst
@@ -263,6 +263,18 @@ All instances of ``CategoricalDtype`` compare equal to the string ``'category'``
 
    c1 == "category"
 
+But notice that the ``categories_dtype`` should be considered, especially when comparing with
+two empty ``CategoricalDtype`` instances:
+
+.. ipython:: python
+    import numpy as np
+
+    c2 = pd.Categorical(np.full(2, np.nan, dtype=object))
+    c3 = pd.Categorical(np.full(2, np.nan, dtype=float))
+
+    # Unequal, since their categories_dtype are different
+    c2.dtype == c3.dtype
+
 Description
 -----------
 

From b4dd2b3968c2b116da403737989b68b7295fcdb0 Mon Sep 17 00:00:00 2001
From: Zhengbo Wang <77875500+luke396@users.noreply.github.com>
Date: Tue, 6 Feb 2024 13:15:50 +0800
Subject: [PATCH 2/4] Update doc

---
 doc/source/user_guide/categorical.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/doc/source/user_guide/categorical.rst b/doc/source/user_guide/categorical.rst
index b5640c5d83e6c..3dc1812fd9ec4 100644
--- a/doc/source/user_guide/categorical.rst
+++ b/doc/source/user_guide/categorical.rst
@@ -269,10 +269,12 @@ two empty ``CategoricalDtype`` instances:
 .. ipython:: python
     import numpy as np
 
-    c2 = pd.Categorical(np.full(2, np.nan, dtype=object))
-    c3 = pd.Categorical(np.full(2, np.nan, dtype=float))
+    c2 = pd.Categorical(np.array([], dtype=object))
+    c3 = pd.Categorical(np.array([], dtype=float))
 
     # Unequal, since their categories_dtype are different
+    # c2.dtype = CategoricalDtype(categories=[], ordered=False, categories_dtype=object)
+    # c3.dtype = CategoricalDtype(categories=[], ordered=False, categories_dtype=float64)
     c2.dtype == c3.dtype
 
 Description

From 69e79f7324167f6a07041d0c5486f10bcf1186fa Mon Sep 17 00:00:00 2001
From: Zhengbo Wang <77875500+luke396@users.noreply.github.com>
Date: Sun, 11 Feb 2024 17:28:47 +0800
Subject: [PATCH 3/4] Update doc

---
 doc/source/reference/indexing.rst | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/doc/source/reference/indexing.rst b/doc/source/reference/indexing.rst
index fa6105761df0a..659fe31affb3c 100644
--- a/doc/source/reference/indexing.rst
+++ b/doc/source/reference/indexing.rst
@@ -41,6 +41,7 @@ Properties
    Index.empty
    Index.T
    Index.memory_usage
+   Index.array
 
 Modifying and computations
 ~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -110,6 +111,7 @@ Conversion
    Index.to_list
    Index.to_series
    Index.to_frame
+   Index.to_numpy
    Index.view
 
 Sorting

From ad193ab39438a008b6809ef368818477eabeea22 Mon Sep 17 00:00:00 2001
From: Zhengbo Wang <77875500+luke396@users.noreply.github.com>
Date: Sun, 11 Feb 2024 17:41:49 +0800
Subject: [PATCH 4/4] Remove careless

---
 doc/source/user_guide/categorical.rst | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/doc/source/user_guide/categorical.rst b/doc/source/user_guide/categorical.rst
index 3dc1812fd9ec4..8fb991dca02db 100644
--- a/doc/source/user_guide/categorical.rst
+++ b/doc/source/user_guide/categorical.rst
@@ -263,20 +263,6 @@ All instances of ``CategoricalDtype`` compare equal to the string ``'category'``
 
    c1 == "category"
 
-But notice that the ``categories_dtype`` should be considered, especially when comparing with
-two empty ``CategoricalDtype`` instances:
-
-.. ipython:: python
-    import numpy as np
-
-    c2 = pd.Categorical(np.array([], dtype=object))
-    c3 = pd.Categorical(np.array([], dtype=float))
-
-    # Unequal, since their categories_dtype are different
-    # c2.dtype = CategoricalDtype(categories=[], ordered=False, categories_dtype=object)
-    # c3.dtype = CategoricalDtype(categories=[], ordered=False, categories_dtype=float64)
-    c2.dtype == c3.dtype
-
 Description
 -----------