polars.Expr.rechunk#

Expr.rechunk() Expr[source]#

Create a single chunk of memory for this Series.

Examples

>>> df = pl.DataFrame({"a": [1, 1, 2]})
>>> # Create a Series with 3 nulls, append column a then rechunk
>>> (df.select(pl.repeat(None, 3).append(pl.col("a")).rechunk()))
shape: (6, 1)
┌─────────┐
│ literal │
│ ---     │
│ i64     │
╞═════════╡
│ null    │
├╌╌╌╌╌╌╌╌╌┤
│ null    │
├╌╌╌╌╌╌╌╌╌┤
│ null    │
├╌╌╌╌╌╌╌╌╌┤
│ 1       │
├╌╌╌╌╌╌╌╌╌┤
│ 1       │
├╌╌╌╌╌╌╌╌╌┤
│ 2       │
└─────────┘