polars.nth

polars.nth(*indices: int | Sequence[int]) → Expr

Get the nth column(s) of the context.

Parameters:

indices

One or more indices representing the columns to retrieve.

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [1, 8, 3],
...         "b": [4, 5, 2],
...         "c": ["foo", "bar", "baz"],
...     }
... )
>>> df.select(pl.nth(1))
shape: (3, 1)
┌─────┐
│ b   │
│ --- │
│ i64 │
╞═════╡
│ 4   │
│ 5   │
│ 2   │
└─────┘
>>> df.select(pl.nth(2, 0))
shape: (3, 2)
┌─────┬─────┐
│ c   ┆ a   │
│ --- ┆ --- │
│ str ┆ i64 │
╞═════╪═════╡
│ foo ┆ 1   │
│ bar ┆ 8   │
│ baz ┆ 3   │
└─────┴─────┘