polars.Expr.argsort#

Expr.argsort(descending: bool = False, nulls_last: bool = False) → Self[source]#

Get the index values that would sort this column.

Alias for Expr.arg_sort().

Deprecated since version 0.16.5: Expr.argsort will be removed in favour of Expr.arg_sort.

Parameters:

descending: Sort in descending order.
nulls_last: Place null values last instead of first.

Returns:

Expr: Series of dtype UInt32.

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [20, 10, 30],
...     }
... )
>>> df.select(pl.col("a").argsort())
shape: (3, 1)
┌─────┐
│ a   │
│ --- │
│ u32 │
╞═════╡
│ 1   │
│ 0   │
│ 2   │
└─────┘