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Joris Van den Bossche authored and GitHub committed dd3670583d6
GH-34884: [Python]: Support pickling pyarrow.dataset Partitioning subclasses (#36462) ### Rationale for this change Add support for pickling Directory/Hive/FilenamePartitioning objects. Does not yet actually fix the issue #34884, because this PR only addresses the actual Partitioning subclasses, and not the PartitioningFactory subclasses. ### Are these changes tested? Yes ### Are there any user-facing changes? Only new support for pickling and `==` operation. * Issue: #34884 Lead-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com> Co-authored-by: Weston Pace <weston.pace@gmail.com> Signed-off-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>