Raise ValueError when writing DataFrame with duplicate columns #18
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Previously, the call to self._check_dtypes within ParquetDataFrameProtocol#write would fail with duplicate columns because it expects df[col] to always be a series. If the col in question appears more than once, df[col] produces a DataFrame. We do not support writing DataFrames with duplicate columns. This commit raises a ValueError if it encounters this scenario when writing.
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Previously, the call to
self._check_dtypeswithinParquetDataFrameProtocol#writewould fail with duplicate columns because it expectsdf[col]to always be apd.Series. If thecolin question appears more than once,df[col]produces apd.DataFrame. We do not support writingDataFrames with duplicate columns. This commit raises aValueErrorif it encounters this scenario when writing.