jorisvandenbossche commented on code in PR #15083:
URL: https://github.com/apache/arrow/pull/15083#discussion_r1086704755
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python/pyarrow/table.pxi:
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@@ -5368,6 +5368,9 @@ list[tuple(str, str, FunctionOptions)]
List of tuples made of aggregation column names followed
by function names and optionally aggregation function options.
Pass empty list to get a single row for each group.
+ The column names can be a string, an empty list or a list of
+ column names, for unary, nullary and n-ary aggregation functions
+ respectively.
Review Comment:
```suggestion
List of tuples, where each tuple is one aggregation specification
and consists of: aggregation column name followed
by function name and optionally aggregation function option.
Pass empty list to get a single row for each group.
The column name can be a string, an empty list or a list of
column names, for unary, nullary and n-ary aggregation functions
respectively.
```
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