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# Description Provides functionality similar to https://docs.pola.rs/api/python/stable/reference/dataframe/api/polars.dataframe.group_by.GroupBy.first.html by allowing polars first to be used with a group by ``` > ❯ : [[a b c d]; [1 0.5 true Apple] [2 0.5 true Orange] [2 4 true Apple] [3 10 false Apple] [4 13 false Banana] [5 14 true Banana]] | polars into-df -s {a: u8, b: f32, c: bool, d: str} | polars group-by d | polars first | polars collect ╭───┬────────┬───┬───────┬───────╮ │ # │ d │ a │ b │ c │ ├───┼────────┼───┼───────┼───────┤ │ 0 │ Apple │ 1 │ 0.50 │ true │ │ 1 │ Banana │ 4 │ 13.00 │ false │ │ 2 │ Orange │ 2 │ 0.50 │ true │ ╰───┴────────┴───┴───────┴───────╯ ``` Additionally, I am setting the POLARS_ALLOW_EXTENSION to true to avoid panicking with operations using the dtype object. The conversion will fallback to object when the type cannot be determining, so this could be a common case. # User-Facing Changes - `polars first` can now be used with `polars group-by` --------- Co-authored-by: Jack Wright <jack.wright@nike.com>