polars.Expr.drop_nulls

Expr.drop_nulls() → Self

Drop all null values.

Warning

Note that null values are not floating point NaN values! To drop NaN values, use drop_nans().

Examples

>>> df = pl.DataFrame(
...     {
...         "a": [8, 9, 10, 11],
...         "b": [None, 4.0, 4.0, float("nan")],
...     }
... )
>>> df.select(pl.col("b").drop_nulls())
shape: (3, 1)
┌─────┐
│ b   │
│ --- │
│ f64 │
╞═════╡
│ 4.0 │
│ 4.0 │
│ NaN │
└─────┘