polars.Expr.explode#

Expr.explode() → Self[source]#

Explode a list expression.

This means that every item is expanded to a new row.

Returns:

Expr: Expression with the data type of the list elements.

See also

Expr.list.explode: Explode a list column.
Expr.str.explode: Explode a string column.

Examples

>>> df = pl.DataFrame(
...     {
...         "group": ["a", "b"],
...         "values": [
...             [1, 2],
...             [3, 4],
...         ],
...     }
... )
>>> df.select(pl.col("values").explode())
shape: (4, 1)
┌────────┐
│ values │
│ ---    │
│ i64    │
╞════════╡
│ 1      │
│ 2      │
│ 3      │
│ 4      │
└────────┘