ARROW-2273: [Python] Raise NotImplementedError when pandas Sparse types serializing #1997
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pandas Sparse types are planned to be deprecated in pandas future releases. pandas-dev/pandas#19239
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This fixes ARROW-2273.
pandasSparse types are planned to be deprecated in pandas future releases (pandas-dev/pandas#19239).SparseDataFrameandSparseSeriesare naive implementation and have many bugs. IMO, this is not the right time to support these inpyarrow.