polars.Expr.list.last

Expr.list.last() → Expr

Get the last value of the sublists.

Examples

>>> df = pl.DataFrame({"a": [[3, 2, 1], [], [1, 2]]})
>>> df.with_columns(last=pl.col("a").list.last())
shape: (3, 2)
┌───────────┬──────┐
│ a         ┆ last │
│ ---       ┆ ---  │
│ list[i64] ┆ i64  │
╞═══════════╪══════╡
│ [3, 2, 1] ┆ 1    │
│ []        ┆ null │
│ [1, 2]    ┆ 2    │
└───────────┴──────┘