From 8e86026396999b1fbc9ded1d4476d5c2c1ecf888 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 8 Jan 2024 09:50:26 -0800
Subject: [PATCH 1/2] Fix to_numeric not preserving Series index and name

---
 python/cudf/cudf/core/tools/numeric.py   |  4 ++--
 python/cudf/cudf/tests/test_numerical.py | 10 +++++++++-
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/python/cudf/cudf/core/tools/numeric.py b/python/cudf/cudf/core/tools/numeric.py
index b1bcf4b98c5..a28c679b8be 100644
--- a/python/cudf/cudf/core/tools/numeric.py
+++ b/python/cudf/cudf/core/tools/numeric.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2018-2023, NVIDIA CORPORATION.
+# Copyright (c) 2018-2024, NVIDIA CORPORATION.
 
 import warnings
 
@@ -161,7 +161,7 @@ def to_numeric(arg, errors="raise", downcast=None):
                     break
 
     if isinstance(arg, (cudf.Series, pd.Series)):
-        return cudf.Series(col)
+        return cudf.Series(col, index=arg.index, name=arg.name)
     else:
         if col.has_nulls():
             # To match pandas, always return a floating type filled with nan.
diff --git a/python/cudf/cudf/tests/test_numerical.py b/python/cudf/cudf/tests/test_numerical.py
index 5bb55c164fe..c39d91b94b1 100644
--- a/python/cudf/cudf/tests/test_numerical.py
+++ b/python/cudf/cudf/tests/test_numerical.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021-2023, NVIDIA CORPORATION.
+# Copyright (c) 2021-2024, NVIDIA CORPORATION.
 
 import numpy as np
 import pandas as pd
@@ -425,3 +425,11 @@ def test_series_to_numeric_bool(data, downcast):
     got = cudf.to_numeric(gs, downcast=downcast)
 
     assert_eq(expect, got)
+
+
+@pytest.mark.parametrize("klass", [cudf.Series, pd.Series])
+def test_series_to_numeric_preserve_index_name(klass):
+    ser = klass(["1"] * 8, index=range(2, 10), name="name")
+    result = cudf.to_numeric(ser)
+    expected = klass([1] * 8, index=range(2, 10), name="name")
+    assert_eq(result, expected)

From 2fcc86d2b7566cd0fbe6dd570971374cdf646ed9 Mon Sep 17 00:00:00 2001
From: Matthew Roeschke <10647082+mroeschke@users.noreply.github.com>
Date: Mon, 8 Jan 2024 09:51:46 -0800
Subject: [PATCH 2/2] expected is cudf.Series

---
 python/cudf/cudf/tests/test_numerical.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/python/cudf/cudf/tests/test_numerical.py b/python/cudf/cudf/tests/test_numerical.py
index c39d91b94b1..fee5cc0ad21 100644
--- a/python/cudf/cudf/tests/test_numerical.py
+++ b/python/cudf/cudf/tests/test_numerical.py
@@ -431,5 +431,5 @@ def test_series_to_numeric_bool(data, downcast):
 def test_series_to_numeric_preserve_index_name(klass):
     ser = klass(["1"] * 8, index=range(2, 10), name="name")
     result = cudf.to_numeric(ser)
-    expected = klass([1] * 8, index=range(2, 10), name="name")
+    expected = cudf.Series([1] * 8, index=range(2, 10), name="name")
     assert_eq(result, expected)