Method schema

python/ray/data/dataset.py:4160–4185

Return the schema of the dataset. Examples: >>> import ray >>> ds = ray.data.range(10) >>> ds.schema() Column Type ------ ---- id int64 Time complexity: O(1) Args: fetch_if_missing:

(self, fetch_if_missing: bool = True)

    )
    @PublicAPI(api_group=IM_API_GROUP)
    def schema(self, fetch_if_missing: bool = True) -> Optional["Schema"]:
        """Return the schema of the dataset.

        Examples:
            >>> import ray
            >>> ds = ray.data.range(10)
            >>> ds.schema()
            Column  Type
            ------  ----
            id      int64

        Time complexity: O(1)

        Args:
            fetch_if_missing: If True, synchronously fetch the schema if it's
                not known. If False, None is returned if the schema is not known.
                Default is True.

        Returns:
            The :class:`ray.data.Schema` class of the records, or None if the
            schema is not known and fetch_if_missing is False.
        """
        base_schema = self._base_schema(fetch_if_missing=fetch_if_missing)
        if base_schema is not None:
            return Schema(base_schema, data_context=self.context)
        return None

    @ConsumptionAPI(
        if_more_than_read=True,