Method list

python/ray/data/expressions.py:806–826

Access list operations for this expression. Returns: A _ListNamespace that provides list-specific operations for both PyArrow ``List`` and ``FixedSizeList`` columns. Example: >>> from ray.data.expressions import col >>> import ray

(self)

    @property
    def list(self) -> "_ListNamespace":
        """Access list operations for this expression.

        Returns:
            A _ListNamespace that provides list-specific operations for both
            PyArrow ``List`` and ``FixedSizeList`` columns.

        Example:
            >>> from ray.data.expressions import col
            >>> import ray
            >>> ds = ray.data.from_items([
            ...     {"items": [1, 2, 3]},
            ...     {"items": [4, 5]}
            ... ])
            >>> ds = ds.with_column("num_items", col("items").list.len())
            >>> ds = ds.with_column("first_item", col("items").list[0])
            >>> ds = ds.with_column("slice", col("items").list[1:3])
        """
        from ray.data.namespace_expressions.list_namespace import _ListNamespace

        return _ListNamespace(self)

    @property
    def str(self) -> "_StringNamespace":