Revert "[Datasets] Explicitly define Dataset-like APIs in DatasetPipeline class (#26394)" (#26625)

python/ray/data/dataset_pipeline.py

@@ -1,3 +1,4 @@
+import inspect
 import itertools
 import logging
 import time
@@ -5,13 +6,11 @@ from typing import (
     TYPE_CHECKING,
     Any,
     Callable,
-    Dict,
     Generic,
     Iterable,
     Iterator,
     List,
     Optional,
-    Tuple,
     Union,
 )
 
@@ -19,34 +18,53 @@ import ray
 from ray.data._internal import progress_bar
 from ray.data._internal.block_batching import BatchType, batch_blocks
 from ray.data._internal.block_list import BlockList
-from ray.data._internal.compute import ComputeStrategy
 from ray.data._internal.pipeline_executor import (
     PipelineExecutor,
     PipelineSplitExecutorCoordinator,
 )
 from ray.data._internal.plan import ExecutionPlan
 from ray.data._internal.stats import DatasetPipelineStats, DatasetStats
-from ray.data.block import BatchUDF, Block, KeyFn, RowUDF
+from ray.data.block import Block
 from ray.data.context import DatasetContext
-from ray.data.dataset import Dataset, T, U, TensorflowFeatureTypeSpec
-from ray.data.datasource import Datasource
-from ray.data.datasource.file_based_datasource import (
-    BlockWritePathProvider,
-    DefaultBlockWritePathProvider,
-)
+from ray.data.dataset import Dataset, T, U
 from ray.data.row import TableRow
 from ray.types import ObjectRef
 from ray.util.annotations import DeveloperAPI, PublicAPI
 
 if TYPE_CHECKING:
-    import pandas
     import pyarrow
-    import tensorflow as tf
-    import torch
-
 
 logger = logging.getLogger(__name__)
 
+# Operations that can be naively applied per dataset row in the pipeline.
+_PER_DATASET_OPS = [
+    "map",
+    "map_batches",
+    "add_column",
+    "drop_columns",
+    "flat_map",
+    "filter",
+]
+
+# Operations that apply to each dataset holistically in the pipeline.
+_HOLISTIC_PER_DATASET_OPS = [
+    "repartition",
+    "random_shuffle",
+    "sort",
+    "randomize_block_order",
+]
+
+# Similar to above but we should force evaluation immediately.
+_PER_DATASET_OUTPUT_OPS = [
+    "write_json",
+    "write_csv",
+    "write_parquet",
+    "write_datasource",
+]
+
+# Operations that operate over the stream of output batches from the pipeline.
+_OUTPUT_ITER_OPS = ["take", "take_all", "show", "to_tf", "to_torch"]
+
 
 @PublicAPI
 class DatasetPipeline(Generic[T]):
@@ -682,308 +700,6 @@ class DatasetPipeline(Generic[T]):
 
         return EpochDelimitedIterator(self, max_epoch)
 
-    def map(
-        self,
-        fn: RowUDF,
-        *,
-        compute: Union[str, ComputeStrategy] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.map <ray.data.Dataset.map>` to each dataset/window
-        in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.map(fn, compute=compute, **ray_remote_args)
-        )
-
-    def map_batches(
-        self,
-        fn: BatchUDF,
-        *,
-        batch_size: Optional[int] = 4096,
-        compute: Union[str, ComputeStrategy] = None,
-        batch_format: str = "native",
-        fn_args: Optional[Iterable[Any]] = None,
-        fn_kwargs: Optional[Dict[str, Any]] = None,
-        fn_constructor_args: Optional[Iterable[Any]] = None,
-        fn_constructor_kwargs: Optional[Dict[str, Any]] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.map_batches <ray.data.Dataset.map_batches>` to each
-        dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.map_batches(
-                fn,
-                batch_size=batch_size,
-                compute=compute,
-                batch_format=batch_format,
-                fn_args=fn_args,
-                fn_kwargs=fn_kwargs,
-                fn_constructor_args=fn_constructor_args,
-                fn_constructor_kwargs=fn_constructor_kwargs,
-                **ray_remote_args,
-            )
-        )
-
-    def flat_map(
-        self,
-        fn: RowUDF,
-        *,
-        compute: Union[str, ComputeStrategy] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.flat_map <ray.data.Dataset.flat_map>` to each
-        dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.flat_map(fn, compute=compute, **ray_remote_args)
-        )
-
-    def filter(
-        self,
-        fn: RowUDF,
-        *,
-        compute: Union[str, ComputeStrategy] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[T]":
-        """Apply :py:meth:`Dataset.filter <ray.data.Dataset.filter>` to each
-        dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.filter(fn, compute=compute, **ray_remote_args)
-        )
-
-    def add_column(
-        self,
-        col: str,
-        fn: Callable[["pandas.DataFrame"], "pandas.Series"],
-        *,
-        compute: Optional[str] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.add_column <ray.data.Dataset.add_column>` to each
-        dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.add_column(col, fn, compute=compute, **ray_remote_args)
-        )
-
-    def drop_columns(
-        self,
-        cols: List[str],
-        *,
-        compute: Optional[str] = None,
-        **ray_remote_args,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.drop_columns <ray.data.Dataset.drop_columns>` to
-        each dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.drop_columns(cols, compute=compute, **ray_remote_args)
-        )
-
-    def repartition_each_window(
-        self, num_blocks: int, *, shuffle: bool = False
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.repartition <ray.data.Dataset.repartition>` to each
-        dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.repartition(num_blocks, shuffle=shuffle)
-        )
-
-    def random_shuffle_each_window(
-        self,
-        *,
-        seed: Optional[int] = None,
-        num_blocks: Optional[int] = None,
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.random_shuffle <ray.data.Dataset.random_shuffle>` to
-        each dataset/window in this pipeline."""
-        return self.foreach_window(
-            lambda ds: ds.random_shuffle(seed=seed, num_blocks=num_blocks)
-        )
-
-    def sort_each_window(
-        self, key: Optional[KeyFn] = None, descending: bool = False
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.sort <ray.data.Dataset.sort>` to each dataset/window
-        in this pipeline."""
-        return self.foreach_window(lambda ds: ds.sort(key, descending))
-
-    def randomize_block_order_each_window(
-        self, *, seed: Optional[int] = None
-    ) -> "DatasetPipeline[U]":
-        """Apply :py:meth:`Dataset.randomize_block_order
-        <ray.data.Dataset.randomize_block_order>` to each dataset/window in this
-        pipeline."""
-        return self.foreach_window(lambda ds: ds.randomize_block_order(seed=seed))
-
-    def write_json(
-        self,
-        path: str,
-        *,
-        filesystem: Optional["pyarrow.fs.FileSystem"] = None,
-        try_create_dir: bool = True,
-        arrow_open_stream_args: Optional[Dict[str, Any]] = None,
-        block_path_provider: BlockWritePathProvider = DefaultBlockWritePathProvider(),
-        pandas_json_args_fn: Callable[[], Dict[str, Any]] = lambda: {},
-        ray_remote_args: Dict[str, Any] = None,
-        **pandas_json_args,
-    ) -> None:
-        """Call :py:meth:`Dataset.write_json <ray.data.Dataset.write_json>` on each
-        output dataset of this pipeline."""
-        self._write_each_dataset(
-            lambda ds: ds.write_json(
-                path,
-                filesystem=filesystem,
-                try_create_dir=try_create_dir,
-                arrow_open_stream_args=arrow_open_stream_args,
-                block_path_provider=block_path_provider,
-                pandas_json_args_fn=pandas_json_args_fn,
-                ray_remote_args=ray_remote_args,
-                **pandas_json_args,
-            )
-        )
-
-    def write_csv(
-        self,
-        path: str,
-        *,
-        filesystem: Optional["pyarrow.fs.FileSystem"] = None,
-        try_create_dir: bool = True,
-        arrow_open_stream_args: Optional[Dict[str, Any]] = None,
-        block_path_provider: BlockWritePathProvider = DefaultBlockWritePathProvider(),
-        arrow_csv_args_fn: Callable[[], Dict[str, Any]] = lambda: {},
-        ray_remote_args: Dict[str, Any] = None,
-        **arrow_csv_args,
-    ) -> None:
-        """Call :py:meth:`Dataset.write_csv <ray.data.Dataset.write_csv>` on each
-        output dataset of this pipeline."""
-        self._write_each_dataset(
-            lambda ds: ds.write_csv(
-                path,
-                filesystem=filesystem,
-                try_create_dir=try_create_dir,
-                arrow_open_stream_args=arrow_open_stream_args,
-                block_path_provider=block_path_provider,
-                arrow_csv_args_fn=arrow_csv_args_fn,
-                ray_remote_args=ray_remote_args,
-                **arrow_csv_args,
-            )
-        )
-
-    def write_parquet(
-        self,
-        path: str,
-        *,
-        filesystem: Optional["pyarrow.fs.FileSystem"] = None,
-        try_create_dir: bool = True,
-        arrow_open_stream_args: Optional[Dict[str, Any]] = None,
-        block_path_provider: BlockWritePathProvider = DefaultBlockWritePathProvider(),
-        arrow_parquet_args_fn: Callable[[], Dict[str, Any]] = lambda: {},
-        ray_remote_args: Dict[str, Any] = None,
-        **arrow_parquet_args,
-    ) -> None:
-        """Call :py:meth:`Dataset.write_parquet <ray.data.Dataset.write_parquet>` on
-        each output dataset of this pipeline."""
-        self._write_each_dataset(
-            lambda ds: ds.write_parquet(
-                path,
-                filesystem=filesystem,
-                try_create_dir=try_create_dir,
-                arrow_open_stream_args=arrow_open_stream_args,
-                block_path_provider=block_path_provider,
-                arrow_parquet_args_fn=arrow_parquet_args_fn,
-                ray_remote_args=ray_remote_args,
-                **arrow_parquet_args,
-            )
-        )
-
-    def write_datasource(
-        self,
-        datasource: Datasource[T],
-        *,
-        ray_remote_args: Dict[str, Any] = None,
-        **write_args,
-    ) -> None:
-        """Call :py:meth:`Dataset.write_datasource <ray.data.Dataset.write_datasource>`
-        on each output dataset of this pipeline."""
-        self._write_each_dataset(
-            lambda ds: ds.write_datasource(
-                datasource,
-                ray_remote_args=ray_remote_args,
-                **write_args,
-            )
-        )
-
-    def take(self, limit: int = 20) -> List[T]:
-        """Call :py:meth:`Dataset.take <ray.data.Dataset.take>` over the stream of
-        output batches from the pipeline"""
-        return Dataset.take(self, limit)
-
-    def take_all(self, limit: int = 100000) -> List[T]:
-        """Call :py:meth:`Dataset.take_all <ray.data.Dataset.take_all>` over the stream
-        of output batches from the pipeline"""
-        return Dataset.take_all(self, limit)
-
-    def show(self, limit: int = 20) -> None:
-        """Call :py:meth:`Dataset.show <ray.data.Dataset.show>` over the stream of
-        output batches from the pipeline"""
-        return Dataset.show(self, limit)
-
-    def to_tf(
-        self,
-        *,
-        output_signature: Union[
-            TensorflowFeatureTypeSpec, Tuple[TensorflowFeatureTypeSpec, "tf.TypeSpec"]
-        ],
-        label_column: Optional[str] = None,
-        feature_columns: Optional[
-            Union[List[str], List[List[str]], Dict[str, List[str]]]
-        ] = None,
-        prefetch_blocks: int = 0,
-        batch_size: int = 1,
-        drop_last: bool = False,
-    ) -> "tf.data.Dataset":
-        """Call :py:meth:`Dataset.to_tf <ray.data.Dataset.to_tf>` over the stream of
-        output batches from the pipeline"""
-        return Dataset.to_tf(
-            self,
-            output_signature=output_signature,
-            label_column=label_column,
-            feature_columns=feature_columns,
-            prefetch_blocks=prefetch_blocks,
-            batch_size=batch_size,
-            drop_last=drop_last,
-        )
-
-    def to_torch(
-        self,
-        *,
-        label_column: Optional[str] = None,
-        feature_columns: Optional[
-            Union[List[str], List[List[str]], Dict[str, List[str]]]
-        ] = None,
-        label_column_dtype: Optional["torch.dtype"] = None,
-        feature_column_dtypes: Optional[
-            Union["torch.dtype", List["torch.dtype"], Dict[str, "torch.dtype"]]
-        ] = None,
-        batch_size: int = 1,
-        prefetch_blocks: int = 0,
-        drop_last: bool = False,
-        unsqueeze_label_tensor: bool = True,
-        unsqueeze_feature_tensors: bool = True,
-    ) -> "torch.utils.data.IterableDataset":
-        """Call :py:meth:`Dataset.to_torch <ray.data.Dataset.to_torch>` over the stream
-        of output batches from the pipeline"""
-        return Dataset.to_torch(
-            self,
-            label_column=label_column,
-            feature_columns=feature_columns,
-            label_column_dtype=label_column_dtype,
-            feature_column_dtypes=feature_column_dtypes,
-            batch_size=batch_size,
-            prefetch_blocks=prefetch_blocks,
-            drop_last=drop_last,
-            unsqueeze_label_tensor=unsqueeze_label_tensor,
-            unsqueeze_feature_tensors=unsqueeze_feature_tensors,
-        )
-
     @DeveloperAPI
     def iter_datasets(self) -> Iterator[Dataset[T]]:
         """Iterate over the output datasets of this pipeline.
@@ -1113,15 +829,101 @@ class DatasetPipeline(Generic[T]):
         # self._base_datasets_can_be_cleared.
         return len(self._stages) > 0 or self._base_datasets_can_be_cleared
 
-    def _write_each_dataset(self, write_fn: Callable[[Dataset[T]], None]) -> None:
-        """Write output for each dataset.
 
-        This is utility method used for write_json,
-        write_csv, write_parquet, write_datasource, etc.
-        """
-        uuid = None
-        for i, ds in enumerate(self.iter_datasets()):
-            if uuid is None:
-                uuid = self._get_uuid() or ds._get_uuid()
-            ds._set_uuid(f"{uuid}_{i:06}")
-            write_fn(ds)
+for method in _PER_DATASET_OPS:
+
+    def _make_impl(method):
+        delegate = getattr(Dataset, method)
+
+        def impl(self, *args, **kwargs) -> "DatasetPipeline[U]":
+            return self.foreach_window(lambda ds: getattr(ds, method)(*args, **kwargs))
+
+        impl.__name__ = delegate.__name__
+        impl.__doc__ = """
+Apply ``Dataset.{method}`` to each dataset/window in this pipeline.
+""".format(
+            method=method
+        )
+        setattr(
+            impl,
+            "__signature__",
+            inspect.signature(delegate).replace(return_annotation="DatasetPipeline[U]"),
+        )
+        return impl
+
+    setattr(DatasetPipeline, method, _make_impl(method))
+
+for method in _HOLISTIC_PER_DATASET_OPS:
+
+    def _make_impl(method):
+        delegate = getattr(Dataset, method)
+
+        def impl(self, *args, **kwargs) -> "DatasetPipeline[U]":
+            return self.foreach_window(lambda ds: getattr(ds, method)(*args, **kwargs))
+
+        impl.__name__ = delegate.__name__
+        impl.__doc__ = """
+Apply ``Dataset.{method}`` to each dataset/window in this pipeline.
+""".format(
+            method=method
+        )
+        setattr(
+            impl,
+            "__signature__",
+            inspect.signature(delegate).replace(return_annotation="DatasetPipeline[U]"),
+        )
+        return impl
+
+    def _deprecation_warning(method: str):
+        def impl(*a, **kw):
+            raise DeprecationWarning(
+                "`{}` has been renamed to `{}_each_window`.".format(method, method)
+            )
+
+        return impl
+
+    setattr(DatasetPipeline, method, _deprecation_warning(method))
+    setattr(DatasetPipeline, method + "_each_window", _make_impl(method))
+
+for method in _PER_DATASET_OUTPUT_OPS:
+
+    def _make_impl(method):
+        delegate = getattr(Dataset, method)
+
+        def impl(self, *args, **kwargs):
+            uuid = None
+            for i, ds in enumerate(self.iter_datasets()):
+                if uuid is None:
+                    uuid = self._get_uuid() or ds._get_uuid()
+                ds._set_uuid(f"{uuid}_{i:06}")
+                getattr(ds, method)(*args, **kwargs)
+
+        impl.__name__ = delegate.__name__
+        impl.__doc__ = """
+Call ``Dataset.{method}`` on each output dataset of this pipeline.
+""".format(
+            method=method
+        )
+        setattr(impl, "__signature__", inspect.signature(delegate))
+        return impl
+
+    setattr(DatasetPipeline, method, _make_impl(method))
+
+for method in _OUTPUT_ITER_OPS:
+
+    def _make_impl(method):
+        delegate = getattr(Dataset, method)
+
+        def impl(self, *args, **kwargs):
+            return delegate(self, *args, **kwargs)
+
+        impl.__name__ = delegate.__name__
+        impl.__doc__ = """
+Call ``Dataset.{method}`` over the stream of output batches from the pipeline.
+""".format(
+            method=method
+        )
+        setattr(impl, "__signature__", inspect.signature(delegate))
+        return impl
+
+    setattr(DatasetPipeline, method, _make_impl(method))

python/ray/data/tests/test_dataset_pipeline.py

@@ -1,15 +1,12 @@
 import os
 import time
-from typing import Tuple
 
 import pytest
 import pandas as pd
 import numpy as np
 
 import ray
-from ray.data._internal.arrow_block import ArrowRow
 from ray.data.context import DatasetContext
-from ray.data.dataset import Dataset
 from ray.data.dataset_pipeline import DatasetPipeline
 
 from ray.tests.conftest import *  # noqa
@@ -186,23 +183,11 @@ def test_basic_pipeline(ray_start_regular_shared):
     pipe = ds.window(blocks_per_window=1)
     assert str(pipe) == "DatasetPipeline(num_windows=10, num_stages=2)"
     assert pipe.count() == 10
-    pipe = ds.window(blocks_per_window=1)
-    pipe.show()
 
     pipe = ds.window(blocks_per_window=1).map(lambda x: x).map(lambda x: x)
     assert str(pipe) == "DatasetPipeline(num_windows=10, num_stages=4)"
     assert pipe.take() == list(range(10))
 
-    pipe = (
-        ds.window(blocks_per_window=1).map(lambda x: x).flat_map(lambda x: [x, x + 1])
-    )
-    assert str(pipe) == "DatasetPipeline(num_windows=10, num_stages=4)"
-    assert pipe.count() == 20
-
-    pipe = ds.window(blocks_per_window=1).filter(lambda x: x % 2 == 0)
-    assert str(pipe) == "DatasetPipeline(num_windows=10, num_stages=3)"
-    assert pipe.count() == 5
-
     pipe = ds.window(blocks_per_window=999)
     assert str(pipe) == "DatasetPipeline(num_windows=1, num_stages=2)"
     assert pipe.count() == 10
@@ -212,8 +197,6 @@ def test_basic_pipeline(ray_start_regular_shared):
     assert pipe.count() == 100
     pipe = ds.repeat(10)
     assert pipe.sum() == 450
-    pipe = ds.repeat(10)
-    assert len(pipe.take_all()) == 100
 
 
 def test_window(ray_start_regular_shared):
@@ -411,40 +394,15 @@ def test_split_at_indices(ray_start_regular_shared):
     )
 
 
-def _prepare_dataset_to_write(tmp_dir: str) -> Tuple[Dataset[ArrowRow], pd.DataFrame]:
+def test_parquet_write(ray_start_regular_shared, tmp_path):
     df1 = pd.DataFrame({"one": [1, 2, 3], "two": ["a", "b", "c"]})
     df2 = pd.DataFrame({"one": [4, 5, 6], "two": ["e", "f", "g"]})
     df = pd.concat([df1, df2])
     ds = ray.data.from_pandas([df1, df2])
     ds = ds.window(blocks_per_window=1)
-    os.mkdir(tmp_dir)
-    ds._set_uuid("data")
-    return (ds, df)
-
-
-def test_json_write(ray_start_regular_shared, tmp_path):
-    path = os.path.join(tmp_path, "test_json_dir")
-    ds, df = _prepare_dataset_to_write(path)
-    ds.write_json(path)
-    path1 = os.path.join(path, "data_000000_000000.json")
-    path2 = os.path.join(path, "data_000001_000000.json")
-    dfds = pd.concat([pd.read_json(path1, lines=True), pd.read_json(path2, lines=True)])
-    assert df.equals(dfds)
-
-
-def test_csv_write(ray_start_regular_shared, tmp_path):
-    path = os.path.join(tmp_path, "test_csv_dir")
-    ds, df = _prepare_dataset_to_write(path)
-    ds.write_csv(path)
-    path1 = os.path.join(path, "data_000000_000000.csv")
-    path2 = os.path.join(path, "data_000001_000000.csv")
-    dfds = pd.concat([pd.read_csv(path1), pd.read_csv(path2)])
-    assert df.equals(dfds)
-
-
-def test_parquet_write(ray_start_regular_shared, tmp_path):
     path = os.path.join(tmp_path, "test_parquet_dir")
-    ds, df = _prepare_dataset_to_write(path)
+    os.mkdir(path)
+    ds._set_uuid("data")
     ds.write_parquet(path)
     path1 = os.path.join(path, "data_000000_000000.parquet")
     path2 = os.path.join(path, "data_000001_000000.parquet")
@@ -491,23 +449,6 @@ def test_count_sum_on_infinite_pipeline(ray_start_regular_shared):
     assert 9 == pipe.sum()
 
 
-def test_sort_each_window(ray_start_regular_shared):
-    pipe = ray.data.range(12).window(blocks_per_window=3).sort_each_window()
-    assert pipe.take() == list(range(12))
-
-    pipe = (
-        ray.data.range(12).window(blocks_per_window=3).sort_each_window(descending=True)
-    )
-    assert pipe.take() == [2, 1, 0, 5, 4, 3, 8, 7, 6, 11, 10, 9]
-
-    pipe = (
-        ray.data.range(12)
-        .window(blocks_per_window=3)
-        .sort_each_window(key=lambda x: -x, descending=True)
-    )
-    assert pipe.take() == list(range(12))
-
-
 def test_randomize_block_order_each_window(ray_start_regular_shared):
     pipe = ray.data.range(12).repartition(6).window(blocks_per_window=3)
     pipe = pipe.randomize_block_order_each_window(seed=0)
@@ -570,12 +511,11 @@ def test_preserve_whether_base_datasets_can_be_cleared(ray_start_regular_shared)
     assert not p2._base_datasets_can_be_cleared
 
 
-def test_add_and_drop_columns(ray_start_regular_shared):
+def test_drop_columns(ray_start_regular_shared):
     df = pd.DataFrame({"col1": [1, 2, 3], "col2": [2, 3, 4], "col3": [3, 4, 5]})
     ds = ray.data.from_pandas(df)
     pipe = ds.repeat()
-    pipe = pipe.add_column("col4", lambda _: 1)
-    assert pipe.drop_columns(["col2"]).take(1) == [{"col1": 1, "col3": 3, "col4": 1}]
+    assert pipe.drop_columns(["col2"]).take(1) == [{"col1": 1, "col3": 3}]
 
 
 if __name__ == "__main__":