merge main

Author: satvshr

.github/workflows/test.yml

@@ -170,7 +170,7 @@ jobs:
       env:
         OPENML_TEST_SERVER_ADMIN_KEY: ${{ secrets.OPENML_TEST_SERVER_ADMIN_KEY }}
       run: |  # we need a separate step because of the bash-specific if-statement in the previous one.
-        pytest -n 4 --durations=20 --dist load -sv --reruns 5 --reruns-delay 1 -m "not uses_test_server"
+        pytest -n 4 --durations=20 --dist load -sv --reruns 5 --reruns-delay 1 -m "not test_server"
 
     - name: Upload coverage
       if: matrix.code-cov && always()

docs/developer_setup.md

@@ -170,8 +170,8 @@ The OpenML Python SDK utilizes `pytest` markers to categorize tests based on dep
 | Marker            | Description                                                                 |
 |-------------------|-----------------------------------------------------------------------------|
 | `sklearn`          | Tests requiring `scikit-learn`. Skipped if the library is missing.          |
-| `production`      | Tests that interact with the live OpenML server (real API calls).         |
-| `uses_test_server`  | Tests requiring the OpenML test server environment.                       |
+| `production_server`| Tests that interact with the live OpenML server (real API calls).         |
+| `test_server`     | Tests requiring the OpenML test server environment.                       |
 
 ### Execution Examples
 
@@ -190,7 +190,7 @@ pytest -m sklearn
 Exclude production tests (local only):
 
 ```bash
-pytest -m "not production"
+pytest -m "not production_server"
 ```
 
 ### Admin Privilege Tests

openml/_api_calls.py

@@ -22,8 +22,8 @@
 from . import config
 from .__version__ import __version__
 from .exceptions import (
+    OpenMLAuthenticationError,
     OpenMLHashException,
-    OpenMLNotAuthorizedError,
     OpenMLServerError,
     OpenMLServerException,
     OpenMLServerNoResult,
@@ -515,11 +515,7 @@ def __parse_server_exception(
         400,  # run/42 delete
         460,  # task/42 delete
     ]:
-        msg = (
-            f"The API call {url} requires authentication via an API key.\nPlease configure "
-            "OpenML-Python to use your API as described in this example:"
-            "\nhttps://openml.github.io/openml-python/latest/examples/Basics/introduction_tutorial/#authentication"
-        )
-        return OpenMLNotAuthorizedError(message=msg)
+        msg = f"The API call {url} requires authentication via an API key."
+        return OpenMLAuthenticationError(message=msg)
 
     return OpenMLServerException(code=code, message=full_message, url=url)

openml/cli.py

@@ -102,15 +102,15 @@ def check_apikey(apikey: str) -> str:
 
 def configure_server(value: str) -> None:
     def check_server(server: str) -> str:
-        is_shorthand = server in ["test", "production"]
+        is_shorthand = server in ["test", "production_server"]
         if is_shorthand or looks_like_url(server):
             return ""
-        return "Must be 'test', 'production' or a url."
+        return "Must be 'test', 'production_server' or a url."
 
     def replace_shorthand(server: str) -> str:
         if server == "test":
             return f"{config.TEST_SERVER_URL}/api/v1/xml"
-        if server == "production":
+        if server == "production_server":
             return "https://www.openml.org/api/v1/xml"
         return server
 
@@ -119,7 +119,7 @@ def replace_shorthand(server: str) -> str:
         value=value,
         check_with_message=check_server,
         intro_message="Specify which server you wish to connect to.",
-        input_message="Specify a url or use 'test' or 'production' as a shorthand: ",
+        input_message="Specify a url or use 'test' or 'production_server' as a shorthand: ",
         sanitize=replace_shorthand,
     )
 

openml/exceptions.py

@@ -63,5 +63,28 @@ class OpenMLNotAuthorizedError(OpenMLServerError):
     """Indicates an authenticated user is not authorized to execute the requested action."""
 
 
+class OpenMLAuthenticationError(OpenMLServerError):
+    """Exception raised when API authentication fails.
+
+    This typically occurs when:
+    - No API key is configured
+    - The API key is invalid or expired
+    - The API key format is incorrect
+
+    This is different from authorization (OpenMLNotAuthorizedError), which occurs
+    when a valid API key lacks permissions for the requested operation.
+    """
+
+    def __init__(self, message: str):
+        help_text = (
+            "\n\nTo fix this:\n"
+            "1. Get your API key from https://www.openml.org/\n"
+            "   (you'll need to register for a free account if you don't have one)\n"
+            "2. Configure your API key by following the authentication guide:\n"
+            "   https://openml.github.io/openml-python/latest/examples/Basics/introduction_tutorial/#authentication"
+        )
+        super().__init__(message + help_text)
+
+
 class ObjectNotPublishedError(PyOpenMLError):
     """Indicates an object has not been published yet."""

openml/tasks/functions.py

@@ -426,6 +426,9 @@ def get_task(
         # Including class labels as part of task meta data handles
         #   the case where data download was initially disabled
         if isinstance(task, (OpenMLClassificationTask, OpenMLLearningCurveTask)):
+            assert task.target_name is not None, (
+                "Supervised tasks must define a target feature before retrieving class labels."
+            )
             task.class_labels = dataset.retrieve_class_labels(task.target_name)
         # Clustering tasks do not have class labels
         # and do not offer download_split
@@ -599,6 +602,7 @@ def create_task(
         )
 
     return task_cls(
+        task_id=None,
         task_type_id=task_type,
         task_type="None",  # TODO: refactor to get task type string from ID.
         data_set_id=dataset_id,