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new 10cf43bee6 GH-50579: [Python] Fix
test_categorical_order_survives_roundtrip pandas 3.X deprecation (#50608)
10cf43bee6 is described below
commit 10cf43bee644ec002d03f1eda5b5a91051b467cc
Author: Guja <[email protected]>
AuthorDate: Wed Jul 22 23:14:24 2026 +0200
GH-50579: [Python] Fix test_categorical_order_survives_roundtrip pandas 3.X
deprecation (#50608)
### Rationale for this change
Follow-up to #50543. `test_categorical_order_survives_roundtrip` constructs
a
`pd.Categorical` with value "a" not in categories `["b","c","d"]`. pandas
3.0.3
raises a deprecation for out-of-category values, which #50543's
filterwarnings
config now turns into an error - failing nightly wheels across platforms.
### What changes are included in this PR?
Replace the out-of-category `"a"` value with an explicit `None`, preserving
the
test's intent (ordered categorical with non-sorted categories survives a
Parquet
roundtrip, ARROW-6302) plus a null.
### Are these changes tested?
Yes. Reproduced the failure with pandas 3.0.3, confirmed the test passes
after
the change; all categorical tests in the module pass.
### Are there any user-facing changes?
No.
Closes #50579.
* GitHub Issue: #50579
Authored-by: Guja <[email protected]>
Signed-off-by: Rok Mihevc <[email protected]>
---
python/pyarrow/tests/parquet/test_pandas.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/python/pyarrow/tests/parquet/test_pandas.py
b/python/pyarrow/tests/parquet/test_pandas.py
index 8dbd5d71b9..d12b43f4e0 100644
--- a/python/pyarrow/tests/parquet/test_pandas.py
+++ b/python/pyarrow/tests/parquet/test_pandas.py
@@ -472,7 +472,7 @@ def test_categorical_index_survives_roundtrip():
def test_categorical_order_survives_roundtrip():
# ARROW-6302
df = pd.DataFrame({"a": pd.Categorical(
- ["a", "b", "c", "a"], categories=["b", "c", "d"], ordered=True)})
+ ["d", "b", "c", None], categories=["b", "c", "d"], ordered=True)})
table = pa.Table.from_pandas(df)
bos = pa.BufferOutputStream()
