[SPARK-56936][PYTHON][TESTS] Fix PandasUDFReturnTypeTests for pandas 3#55974
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[SPARK-56936][PYTHON][TESTS] Fix PandasUDFReturnTypeTests for pandas 3#55974zhengruifeng wants to merge 4 commits into
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…24.04 tzdata - Switch the tz-aware fixture from the legacy alias `US/Eastern` to its canonical IANA name `America/New_York`. On Ubuntu 24.04 the system `tzdata` package no longer ships the legacy `US/*` aliases (those moved to `tzdata-legacy`), so under pandas >= 3.0 (which resolves tz via stdlib zoneinfo instead of bundled pytz), the previous fixture raised `ZoneInfoNotFoundError` in CI. - Remap the loaded golden DataFrame in memory when running under pandas >= 3.0 so the pandas-2-generated golden columns still line up: `datetime64[ns]` -> `[us]` and `Categorical` categories `object` -> `str`. Only the column keys are remapped; the on-disk golden file is unchanged. Generated-by: Claude Code
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May 19, 2026
Extend the pandas-3 in-memory adapter so the value comparisons also line up: - Scale 13+ digit integers in cells of datetime64 / Timedelta-list columns by 1/1000. Pandas 3 returns microseconds where pandas 2 returned nanoseconds for the same cast, e.g. bigint <- pd.date_range(...).values flips from 86_400_000_000_000 to 86_400_000_000. - Override the single decimal(10,0) x ['12','34']@list cell, which flipped from "X" (pandas 2 errored) to [Decimal('12'), Decimal('34')] (pandas 3 succeeds). Test now passes under both pandas 2.3.3 (spark-dev-313) and pandas 3.0.2 (spark-dev-313-p3) locally. Generated-by: Claude Code
No behavior change. Folds _patch_golden_for_pandas3 directly into the loader block where it is used, since it is only called once. Also replaces the local re.sub helper with Series.str.replace(regex=True) to drop the `import re`. Generated-by: Claude Code
No behavior change. Use self.repr_value(value) and self.repr_type(...) to derive both rename and scale targets directly from self.test_data and the affected Spark type, instead of grep-matching the golden column names. Single loop over test_data builds both rename and scale_cols. Generated-by: Claude Code
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What changes were proposed in this pull request?
Make
pyspark.sql.tests.coercion.test_pandas_udf_return_type.PandasUDFReturnTypeTestswork under pandas >= 3.0 and on systems whosetzdatapackage no longer ships the legacyUS/*aliases (e.g. Ubuntu 24.04 / noble).Switch the tz-aware fixture from
US/EasterntoAmerica/New_York. The values returned bypd.date_range(...).valuesare identical for the two aliases (same zone, same DST rules), so the on-disk golden file does not need to be regenerated.Patch the loaded golden DataFrame in memory for pandas >= 3.0. The golden file was generated under pandas 2 and the on-disk content is unchanged. At load time, when running under pandas >= 3.0, the test:
[us]instead of[ns], andpd.Categoricalkeepsstr-dtyped categories instead ofobject.bigint <- pd.date_range(...).valuesflips from86_400_000_000_000to86_400_000_000).decimal(10,0) x ['12','34']@listcell, which flipped fromX(pandas 2 errored) to[Decimal('12'), Decimal('34')](pandas 3 succeeds at the string -> Decimal coercion).Why are the changes needed?
The scheduled CI run on the
python-312-pandas-3image fails in this suite, e.g. https://github.com/apache/spark/actions/runs/26002965955/job/76430490989. Root causes:pd.date_range("19700101", periods=2, tz="US/Eastern").valuesraiseszoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key US/Eastern'. Pandas 3 droppedpytzas a hard dependency and now resolves tz names through stdlibzoneinfo, which on Ubuntu 24.04 cannot findUS/Easternbecause Ubuntu moved the legacy aliases out oftzdatainto a separatetzdata-legacypackage that the CI image does not install.golden.loc[str_t, str_v]raisesKeyErrorbecause the column keys in the golden file are pandas-2-shaped (datetime64[ns],Categorical(..., object)) but the lookup keys built at runtime are pandas-3-shaped (datetime64[us],Categorical(..., str)).Does this PR introduce any user-facing change?
No. Test-only change.
How was this patch tested?
Ran the suite locally under two envs:
Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Code