Deprecate dataset errors with module __getattr__ (kedro-org#2673)

* Replace and deprecate `DataSet` use in class names

* Replace another format string with an f-string

* Perform deprecations for cached, lambda, and partitioned datasets

* Deprecated `MemoryDataSet` in favor of `MemoryDataset`

Signed-off-by: Deepyaman Datta <[email protected]>

* Fix keyword argument to specify metaclass on `CachedDataSet`

* Fix reference to `PartitionedDataset`

* Keep `AbstractDataSet` subscriptable

* Update __init__.py files, __all__ definitions, etc

* Warn of impending Kedro 0.19 (not abstract future)

* Update `VideoDataSet` to `VideoDataset` (and refs)

* Add missing `kedro.utils.DeprecatedClassMeta` imps

* Change deprecated references to `AbstractDataSet`

Signed-off-by: Deepyaman Datta <[email protected]>

* Warn of impending Kedro 0.19 (not abstract future)

* Rename `pandas.CSVDataSet` to `pandas.CSVDataset`

* Fix some pylint errors and blacken code

* Update `dask.ParquetDataSet`

* Undo changes for `VideoDataSet`, inherit from new base

* Undo changes to `APIDataSet`, inherit from new base

* Fix some imports and missed references

* Undo changes to `BioSequenceDataSet`, inherit from new base

* Undo changes to Dask and Pandas datasets, inherit from new bases

* Remove the `AbstractDataset` and `AbstractVersionedDataset` alias, update `kedro.io.core`

* Undo changes in `kedro/extras/datasets`

* Update branch

* Change `DataSetError` to `DatasetError`

* Remove deprecated aliases for Abstract*DataSet

* Change `DataSetError` to `DatasetError` in tests/

* Change DataSet*Error to Dataset*Error in tests/

* Fix references to DataSet in a lot of tests

* Change `CSVDataset` back to `CSBVDataSet`

* Rename core datasets used across `tests` directory

* Fix "Saving 'None' to a 'DataSet' is not allowed." messages

* Fix `test_http_filesystem_no_versioning` everywhere

* Fix removal of "data"

* Deprecate `_SharedMemoryDataSet` in favor of `_SharedMemoryDataset`

* Fix tests/pipeline/test_pipeline_from_missing.py

* Fix list datasets test

* Change patched IncrementalDataSet to IncrementalDataset

* Fix default checkpoint dataset

* Fix data catalog tests

* Fix error message

* Use `MemoryDataset`, not `MemoryDataSet`, by default

* Use `MemoryDataset`, not `MemoryDataSet`, for missing datasets in data catalog

* Rename DefaultDataSet key to DefaultDataset

* Change `LambdaDataSet` to `LambdaDataset` in `test_node_run.py`

* Update error message--but should I?

* Update error message--but should I?

* Update error message in kedro/io/core.py--but should I?

* Update RELEASE.md

* Fix remaining tests

* Fix lint issues

* Align capitalization

* Add `DeprecatedClassMeta` tests from StackOverflow

* Blacken kedro/utils.py

* Ignore "No value for argument 'subclass' in unbound method call"

* Rename 'foo' to 'value' to satisfy linter

* Disable pylint messages on deprecated class definitions

* Blacken kedro/utils.py

* Wrap `kedro.io.core` to fix error deprecation

* Simplify deprecation of error names to try to fix docs

* Undo attempt to make docs pass

Revert "Simplify deprecation of error names to try to fix docs"

This reverts commit e9294be.

Revert "Wrap `kedro.io.core` to fix error deprecation"

This reverts commit db9b7ac.

* Wrap `kedro.io.core` to fix error deprecation

* Leverage PEP 562 for less hacky error deprecations

* Test old `DataSetError` in `kedro.extras.datasets`

* Fix missing and unnecessary imports/other mistakes

* Blacken kedro/io/core.py

* Don't raise `DeprecationWarning` each time import from  `kedro.io`

* Replace `DataSetError` with `DatasetError` in test

* Add missing "in" to a `DeprecationWarning` message

* Add "Dataset" versions of errors to `kedro.io` doc

* Add updated "Dataset" names to `kedro.io.rst` and sort the entries

* Add `_SharedMemoryDataset` to type targets in conf

* Revert all changes to `DatasetError` in `kedro/extras/datasets`

The idea is so that we're not making changes not in Kedro-Datasets,
and we can be confident that Kedro-Datasets won't break.

* docs(datasets): fix a ref to `GeoJSONLocalDataset`

* Consistently use `DatasetError` in dataset tests

* Remove unused import

* Remove "DataSet" imports from kedro/io/__init__.py

* chore(sdk): use type hints to skirt linting errors

* Implement workaround in `kedro/io/__init__.py` too

* Import future annotation in `kedro/io/__init__.py`

* test(datasets): cover raising a DeprecationWarning

* Ignore pylint warnings (working as intended)

* Replace `globals()` in `kedro.io.core.__getattr__`

* Remove use of `exec` (use `import_module` instead)

* Rename the parameters passed to `test_deprecation`

---------

Signed-off-by: Deepyaman Datta <[email protected]>
Signed-off-by: Juan Lovera <[email protected]>

kedro/extras/datasets/geopandas/__init__.py

@@ -1,4 +1,4 @@
-"""``GeoJSONLocalDataset`` is an ``AbstractVersionedDataSet`` to save and load GeoJSON files.
+"""``GeoJSONDataSet`` is an ``AbstractVersionedDataSet`` to save and load GeoJSON files.
 """
 __all__ = ["GeoJSONDataSet"]
 

kedro/io/__init__.py

@@ -1,16 +1,14 @@
 """``kedro.io`` provides functionality to read and write to a
 number of data sets. At the core of the library is the ``AbstractDataSet`` class.
 """
+from __future__ import annotations
 
 from .cached_dataset import CachedDataSet, CachedDataset
 from .core import (
     AbstractDataSet,
     AbstractVersionedDataSet,
-    DataSetAlreadyExistsError,
     DatasetAlreadyExistsError,
-    DataSetError,
     DatasetError,
-    DataSetNotFoundError,
     DatasetNotFoundError,
     Version,
 )
@@ -24,6 +22,22 @@
     PartitionedDataset,
 )
 
+# https://github.com/pylint-dev/pylint/issues/4300#issuecomment-1043601901
+DataSetError: type[Exception]
+DataSetNotFoundError: type[DatasetError]
+DataSetAlreadyExistsError: type[DatasetError]
+
+
+def __getattr__(name):
+    import kedro.io.core  # pylint: disable=import-outside-toplevel
+
+    if name in (
+        kedro.io.core._DEPRECATED_ERROR_CLASSES  # pylint: disable=protected-access
+    ):
+        return getattr(kedro.io.core, name)
+    raise AttributeError(f"module {repr(__name__)} has no attribute {repr(name)}")
+
+
 __all__ = [
     "AbstractDataSet",
     "AbstractVersionedDataSet",

kedro/io/core.py

@@ -20,7 +20,7 @@
 from cachetools import Cache, cachedmethod
 from cachetools.keys import hashkey
 
-from kedro.utils import DeprecatedClassMeta, load_obj
+from kedro.utils import load_obj
 
 warnings.simplefilter("default", DeprecationWarning)
 
@@ -31,6 +31,11 @@
 PROTOCOL_DELIMITER = "://"
 CLOUD_PROTOCOLS = ("s3", "s3n", "s3a", "gcs", "gs", "adl", "abfs", "abfss", "gdrive")
 
+# https://github.com/pylint-dev/pylint/issues/4300#issuecomment-1043601901
+DataSetError: type[Exception]
+DataSetNotFoundError: type[DatasetError]
+DataSetAlreadyExistsError: type[DatasetError]
+
 
 class DatasetError(Exception):
     """``DatasetError`` raised by ``AbstractDataSet`` implementations
@@ -43,12 +48,6 @@ class DatasetError(Exception):
     pass
 
 
-class DataSetError(metaclass=DeprecatedClassMeta):
-    # pylint: disable=missing-class-docstring, too-few-public-methods
-
-    _DeprecatedClassMeta__alias = DatasetError
-
-
 class DatasetNotFoundError(DatasetError):
     """``DatasetNotFoundError`` raised by ``DataCatalog`` class in case of
     trying to use a non-existing data set.
@@ -57,12 +56,6 @@ class DatasetNotFoundError(DatasetError):
     pass
 
 
-class DataSetNotFoundError(metaclass=DeprecatedClassMeta):
-    # pylint: disable=missing-class-docstring, too-few-public-methods
-
-    _DeprecatedClassMeta__alias = DatasetNotFoundError
-
-
 class DatasetAlreadyExistsError(DatasetError):
     """``DatasetAlreadyExistsError`` raised by ``DataCatalog`` class in case
     of trying to add a data set which already exists in the ``DataCatalog``.
@@ -71,10 +64,24 @@ class DatasetAlreadyExistsError(DatasetError):
     pass
 
 
-class DataSetAlreadyExistsError(metaclass=DeprecatedClassMeta):
-    # pylint: disable=missing-class-docstring, too-few-public-methods
+_DEPRECATED_ERROR_CLASSES = {
+    "DataSetError": DatasetError,
+    "DataSetNotFoundError": DatasetNotFoundError,
+    "DataSetAlreadyExistsError": DatasetAlreadyExistsError,
+}
 
-    _DeprecatedClassMeta__alias = DatasetAlreadyExistsError
+
+def __getattr__(name):
+    if name in _DEPRECATED_ERROR_CLASSES:
+        alias = _DEPRECATED_ERROR_CLASSES[name]
+        warnings.warn(
+            f"{repr(name)} has been renamed to {repr(alias.__name__)}, "
+            f"and the alias will be removed in Kedro 0.19.0",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return alias
+    raise AttributeError(f"module {repr(__name__)} has no attribute {repr(name)}")
 
 
 class VersionNotFoundError(DatasetError):

tests/io/test_core.py

@@ -1,13 +1,19 @@
 from __future__ import annotations
 
+import importlib
 from decimal import Decimal
 from fractions import Fraction
 from pathlib import PurePosixPath
 from typing import Any
 
 import pytest
 
-from kedro.io.core import AbstractDataSet, _parse_filepath, get_filepath_str
+from kedro.io.core import (
+    _DEPRECATED_ERROR_CLASSES,
+    AbstractDataSet,
+    _parse_filepath,
+    get_filepath_str,
+)
 
 # List sourced from https://docs.python.org/3/library/stdtypes.html#truth-value-testing.
 # Excludes None, as None values are not shown in the str representation.
@@ -27,6 +33,13 @@
 ]
 
 
+@pytest.mark.parametrize("module_name", ["kedro.io", "kedro.io.core"])
+@pytest.mark.parametrize("class_name", _DEPRECATED_ERROR_CLASSES)
+def test_deprecation(module_name, class_name):
+    with pytest.warns(DeprecationWarning, match=f"{repr(class_name)} has been renamed"):
+        getattr(importlib.import_module(module_name), class_name)
+
+
 class MyDataSet(AbstractDataSet):
     def __init__(self, var=None):
         self.var = var