polars.Series.all

Series.all(*, ignore_nulls: bool = True) → bool | None

Return whether all values in the column are True.

Only works on columns of data type Boolean.

Parameters:

ignore_nulls

• If set to True (default), null values are ignored. If there are no non-null values, the output is True.

• If set to False, Kleene logic is used to deal with nulls: if the column contains any null values and no False values, the output is None.

Returns:

bool or None

Examples

>>> pl.Series([True, True]).all()
True
>>> pl.Series([False, True]).all()
False
>>> pl.Series([None, True]).all()
True

Enable Kleene logic by setting ignore_nulls=False.

>>> pl.Series([None, True]).all(ignore_nulls=False)  # Returns None