[ENH] V1 → V2 API Migration - studies

openml/__init__.py

@@ -33,6 +33,7 @@
     utils,
 )
 from .__version__ import __version__
+from ._api.runtime.instance import _backend
 from .datasets import OpenMLDataFeature, OpenMLDataset
 from .evaluations import OpenMLEvaluation
 from .flows import OpenMLFlow
@@ -109,6 +110,7 @@ def populate_cache(
     "OpenMLTask",
     "__version__",
     "_api_calls",
+    "_backend",
     "config",
     "datasets",
     "evaluations",

openml/_api/__init__.py

@@ -0,0 +1,24 @@
+"""OpenML API module."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from openml._api.runtime.instance import _backend as backend
+
+if TYPE_CHECKING:
+    from openml._api.runtime.core import APIBackend
+
+__all__ = ["api_context"]
+
+
+class APIContext:
+    """API context for accessing the OpenML backend."""
+
+    @property
+    def backend(self) -> APIBackend:
+        """Get the API backend instance."""
+        return backend
+
+
+api_context = APIContext()

openml/_api/clients/__init__.py

@@ -0,0 +1,8 @@
+from .http import HTTPCache, HTTPClient
+from .minio import MinIOClient
+
+__all__ = [
+    "HTTPCache",
+    "HTTPClient",
+    "MinIOClient",
+]