polars.Expr.slice#
- Expr.slice( ) Expr [source]#
Get a slice of this expression.
- 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 │ └─────┴─────┘