polars.Expr.lt#
- Expr.lt(other: Any) Expr [source]#
Method equivalent of “less than” operator
expr < other
.- Parameters:
- other
A literal or expression value to compare with.
Examples
>>> df = pl.DataFrame( ... data={ ... "x": [1.0, 2.0, float("nan"), 3.0], ... "y": [2.0, 2.0, float("nan"), 4.0], ... } ... ) >>> df.with_columns( ... pl.col("x").lt(pl.col("y")).alias("x < y"), ... ) shape: (4, 3) ┌─────┬─────┬───────┐ │ x ┆ y ┆ x < y │ │ --- ┆ --- ┆ --- │ │ f64 ┆ f64 ┆ bool │ ╞═════╪═════╪═══════╡ │ 1.0 ┆ 2.0 ┆ true │ │ 2.0 ┆ 2.0 ┆ false │ │ NaN ┆ NaN ┆ false │ │ 3.0 ┆ 4.0 ┆ true │ └─────┴─────┴───────┘