Fix transpose for multi-index columns support. #664
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HyukjinKwon
reviewed
Aug 21, 2019
| dtype: object | ||
| """ | ||
| if len(self._internal.index_columns) != 1: | ||
| raise ValueError("Single index must be set to transpose the current DataFrame.") |
HyukjinKwon
reviewed
Aug 21, 2019
databricks/koalas/frame.py
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| [scol_for(sdf, index_column), F.col("pairs.key"), F.col("pairs.value")]) | ||
| exploded_df = self._sdf.withColumn("pairs", pairs).select( | ||
| [F.to_json(F.array([scol.cast('string') | ||
| for scol in self._internal.index_scols])).alias('index'), |
HyukjinKwon
approved these changes
Aug 21, 2019
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I'd merge this for now. Thanks! |
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