[SPARK-46160][PYTHON] Add axis parameter to DataFrame.shift in pandas API on Spark#55545
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devin-petersohn wants to merge 2 commits intoapache:masterfrom
Open
[SPARK-46160][PYTHON] Add axis parameter to DataFrame.shift in pandas API on Spark#55545devin-petersohn wants to merge 2 commits intoapache:masterfrom
devin-petersohn wants to merge 2 commits intoapache:masterfrom
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… API on Spark Co-Authored-By: Claude <noreply@anthropic.com>
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What changes were proposed in this pull request?
Add
axisparameter toDataFrame.shift()in the pandas API on Spark.axis=1shifts values across columns using apandas_udf, with a fast path for small DataFrames following thecompute.shortcut_limitpattern.Why are the changes needed?
pandas
DataFrame.shift()supportsaxis=1but the pandas API on Spark did not.Does this PR introduce any user-facing change?
Yes.
DataFrame.shift()now acceptsaxis(0,1,'index','columns'). Default behavior is unchanged.How was this patch tested?
Added
test_shift_axiscovering axis=0/1, string aliases, various periods, fill_value, single-column, NaN values, multi-index columns, large dataset (UDF path), mixed types, empty DataFrame, and invalid axis.Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Code (claude-opus-4-6)