polars.Expr.not_#
- Expr.not_() Self [source]#
Negate a boolean expression.
Examples
>>> df = pl.DataFrame( ... { ... "a": [True, False, False], ... "b": ["a", "b", None], ... } ... ) >>> df shape: (3, 2) ┌───────┬──────┐ │ a ┆ b │ │ --- ┆ --- │ │ bool ┆ str │ ╞═══════╪══════╡ │ true ┆ a │ │ false ┆ b │ │ false ┆ null │ └───────┴──────┘ >>> df.select(pl.col("a").not_()) shape: (3, 1) ┌───────┐ │ a │ │ --- │ │ bool │ ╞═══════╡ │ false │ │ true │ │ true │ └───────┘