[ENH] Improve Global Config Architecture

openml/__init__.py

@@ -18,9 +18,11 @@
 # License: BSD 3-Clause
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+
 from . import (
     _api_calls,
-    config,
+    config as _config_module,
     datasets,
     evaluations,
     exceptions,
@@ -49,6 +51,11 @@
     OpenMLTask,
 )
 
+if TYPE_CHECKING:
+    from .config import OpenMLConfigManager
+
+config: OpenMLConfigManager = _config_module._config
+
 
 def populate_cache(
     task_ids: list[int] | None = None,

openml/_api_calls.py

@@ -12,7 +12,7 @@
 import xml
 import zipfile
 from pathlib import Path
-from typing import Dict, Tuple, Union
+from typing import Dict, Tuple, Union, cast
 
 import minio
 import requests
@@ -71,7 +71,7 @@ def resolve_env_proxies(url: str) -> str | None:
 
 
 def _create_url_from_endpoint(endpoint: str) -> str:
-    url = config.server
+    url = cast(str, config.server)
     if not url.endswith("/"):
         url += "/"
     url += endpoint
@@ -301,7 +301,8 @@ def _file_id_to_url(file_id: int, filename: str | None = None) -> str:
     Presents the URL how to download a given file id
     filename is optional
     """
-    openml_url = config.server.split("/api/")
+    openml_server = cast(str, config.server)
+    openml_url = openml_server.split("/api/")
     url = openml_url[0] + f"/data/download/{file_id!s}"
     if filename is not None:
         url += "/" + filename

openml/cli.py

@@ -9,6 +9,8 @@
 from typing import Callable
 from urllib.parse import urlparse
 
+from attr import fields
+
 from openml import config
 
 
@@ -339,7 +341,9 @@ def main() -> None:
         "'https://openml.github.io/openml-python/main/usage.html#configuration'.",
     )
 
-    configurable_fields = [f for f in config._defaults if f not in ["max_retries"]]
+    configurable_fields = [
+        f.name for f in fields(config.OpenMLConfig) if f.name not in ["max_retries"]
+    ]
 
     parser_configure.add_argument(
         "field",