daft.functions.contains#

def contains(expr: Expression, substr: str | Expression) -> Expression:
    """Checks whether each string contains the given substring in a string column.

    Args:
        expr: The expression to check.
        substr: The substring to search for as a literal string, or as a column to pick values from

    Returns:
        Expression: a Boolean expression indicating whether each value contains the provided substring

    Examples:
        >>> import daft
        >>> from daft.functions import contains
        >>> df = daft.from_pydict({"x": ["foo", "bar", "baz"]})
        >>> df = df.select(contains(df["x"], "o"))
        >>> df.show()
        ╭───────╮
        │ x     │
        │ ---   │
        │ Bool  │
        ╞═══════╡
        │ true  │
        ├╌╌╌╌╌╌╌┤
        │ false │
        ├╌╌╌╌╌╌╌┤
        │ false │
        ╰───────╯
        <BLANKLINE>
        (Showing first 3 of 3 rows)

    """
    return Expression._call_builtin_scalar_fn("utf8_contains", expr, substr)