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Simplify DataContainer.assign operation #271

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Merged
charlesbluca merged 2 commits into from
Oct 21, 2021
Merged

Simplify DataContainer.assign operation #271

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291c2a1
Simplify DataContainer.assign
charlesbluca Oct 20, 2021
b6ac6b7
Update rename operation to handle duplicate columns
charlesbluca Oct 21, 2021
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17 changes: 9 additions & 8 deletions dask_sql/datacontainer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -171,14 +171,15 @@ def assign(self) -> dd.DataFrame:
a dataframe which has the the columns specified in the
stored ColumnContainer.
"""
df = self.df.assign(
**{
col_from: self.df[col_to]
for col_from, col_to in self.column_container.mapping()
if col_from in self.column_container.columns
}
)
return df[self.column_container.columns]
df = self.df[
[
self.column_container._frontend_backend_mapping[out_col]
for out_col in self.column_container.columns
]
]
df.columns = self.column_container.columns

return df


class UDF:
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