daft.functions.fill_null#

def fill_null(expr: Expression, fill_value: Expression) -> Expression:
    """Fills null values in the Expression with the provided fill_value.

    Returns:
        Expression: Expression with null values filled with the provided fill_value

    Examples:
        >>> import daft
        >>> from daft.functions import fill_null
        >>>
        >>> df = daft.from_pydict({"data": [1, None, 3]})
        >>> df = df.select(fill_null(df["data"], 2))
        >>> df.collect()
        ╭───────╮
        │ data  │
        │ ---   │
        │ Int64 │
        ╞═══════╡
        │ 1     │
        ├╌╌╌╌╌╌╌┤
        │ 2     │
        ├╌╌╌╌╌╌╌┤
        │ 3     │
        ╰───────╯
        <BLANKLINE>
        (Showing first 3 of 3 rows)

    """
    expr = Expression._to_expression(expr)
    fill_value = Expression._to_expression(fill_value)
    return Expression._from_pyexpr(expr._expr.fill_null(fill_value._expr))