daft.functions.list_join#

def list_join(list_expr: Expression, delimiter: str | Expression) -> Expression:
    """Joins every element of a list using the specified string delimiter.

    Args:
        list_expr (List Expression): expression to join
        delimiter (str | String Expression): the delimiter to use to join lists with

    Returns:
        Expression (String Expression): an expression which is every element of the list joined on the delimiter
    """
    return Expression._call_builtin_scalar_fn("list_join", list_expr, delimiter)