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docs(python): Document aggregate_function=None in pivot #9473

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Jun 21, 2023
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docs(python): Document aggregate_function=None in pivot #9473

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10 changes: 8 additions & 2 deletions py-polars/polars/dataframe/frame.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6379,8 +6379,14 @@ def pivot(
columns
Name of the column(s) whose values will be used as the header of the output
DataFrame.
aggregate_function : {'first', 'sum', 'max', 'min', 'mean', 'median', 'last', 'count'}
A predefined aggregate function str or an expression.
aggregate_function
Choose from:
- None: no aggregation takes place, will raise error if multiple values are in group.
- A predefined aggregate function string, one of
{'first', 'sum', 'max', 'min', 'mean', 'median', 'last', 'count'}
- An expression to do the aggregation.
maintain_order
Sort the grouped keys so that the output order is predictable.
sort_columns
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