polars.Expr.truediv#

Expr.truediv(other: Any) → Self[source]#

Method equivalent of float division operator expr / other.

Parameters:

other: Numeric literal or expression value.

See also

floordiv

Notes

Zero-division behaviour follows IEEE-754:

0/0: Invalid operation - mathematically undefined, returns NaN. n/0: On finite operands gives an exact infinite result, eg: ±infinity.

Examples

>>> df = pl.DataFrame(
...     data={"x": [-2, -1, 0, 1, 2], "y": [0.5, 0.0, 0.0, -4.0, -0.5]}
... )
>>> df.with_columns(
...     pl.col("x").truediv(2).alias("x/2"),
...     pl.col("x").truediv(pl.col("y")).alias("x/y"),
... )
shape: (5, 4)
┌─────┬──────┬──────┬───────┐
│ x   ┆ y    ┆ x/2  ┆ x/y   │
│ --- ┆ ---  ┆ ---  ┆ ---   │
│ i64 ┆ f64  ┆ f64  ┆ f64   │
╞═════╪══════╪══════╪═══════╡
│ -2  ┆ 0.5  ┆ -1.0 ┆ -4.0  │
│ -1  ┆ 0.0  ┆ -0.5 ┆ -inf  │
│ 0   ┆ 0.0  ┆ 0.0  ┆ NaN   │
│ 1   ┆ -4.0 ┆ 0.5  ┆ -0.25 │
│ 2   ┆ -0.5 ┆ 1.0  ┆ -4.0  │
└─────┴──────┴──────┴───────┘