polars.Series.list.gather_every#

Series.list.gather_every( n: int | IntoExprColumn, offset: int | IntoExprColumn = 0, ) → Series[source]#

Take every n-th value start from offset in sublists.

Parameters:

n: Gather every n-th element.
offset: Starting index.

Examples

>>> s = pl.Series("a", [[1, 2, 3], [], [6, 7, 8, 9]])
>>> s.list.gather_every(2, offset=1)
shape: (3,)
Series: 'a' [list[i64]]
[
    [2]
    []
    [7, 9]
]