polars.Expr.slice

Expr.slice(
    offset: int | Expr,
    length: int | Expr | None = None,
) → Expr

Get a slice of this expression.

engine:In MemoryStreamingDistributed

Parameters:

offset

Start index. Negative indexing is supported.

length

Length of the slice. If set to None, all rows starting at the offset will be selected.

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [8, 9, 10, 11],
...         "b": [None, 4, 4, 4],
...     }
... )
>>> df.select(pl.all().slice(1, 2))
shape: (2, 2)
┌─────┬─────┐
│ a   ┆ b   │
│ --- ┆ --- │
│ i64 ┆ i64 │
╞═════╪═════╡
│ 9   ┆ 4   │
│ 10  ┆ 4   │
└─────┴─────┘