polars.dataframe.group_by.GroupBy.__iter__#
- GroupBy.__iter__() Self [source]#
Allows iteration over the groups of the group by operation.
Each group is represented by a tuple of
(name, data)
. The group names are tuples of the distinct group values that identify each group.Examples
>>> df = pl.DataFrame({"foo": ["a", "a", "b"], "bar": [1, 2, 3]}) >>> for name, data in df.group_by("foo"): ... print(name) ... print(data) (a,) shape: (2, 2) ┌─────┬─────┐ │ foo ┆ bar │ │ --- ┆ --- │ │ str ┆ i64 │ ╞═════╪═════╡ │ a ┆ 1 │ │ a ┆ 2 │ └─────┴─────┘ (b,) shape: (1, 2) ┌─────┬─────┐ │ foo ┆ bar │ │ --- ┆ --- │ │ str ┆ i64 │ ╞═════╪═════╡ │ b ┆ 3 │ └─────┴─────┘