Stabilize Windows 3.14 notebook tests by avoiding loky backend (#138)

* Avoid loky backend in notebook tests on Windows 3.14

* Skip loky deadlock-prone tests on Windows Python 3.14

Author: tobiasraabe

tests/conftest.py

@@ -85,7 +85,7 @@ def pytest_collection_modifyitems(session, config, items) -> None:  # noqa: ARG0
 
 
 skip_if_deadlock = pytest.mark.skipif(
-    (sys.version_info[:2] in [(3, 12), (3, 13)] and sys.platform == "win32")
+    (sys.version_info[:2] in [(3, 12), (3, 13), (3, 14)] and sys.platform == "win32")
     or (sys.version_info[:2] == (3, 13) and sys.platform == "linux"),
     reason="Deadlock in loky/backend/resource_tracker.py, line 181, maybe related to https://github.com/joblib/loky/pull/450",
 )

tests/test_jupyter/test_functional_interface.ipynb

@@ -44,7 +44,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "session = pytask.build(tasks=[create_file, create_text], n_workers=2)\n",
+    "session = pytask.build(\n",
+    "    tasks=[create_file, create_text], n_workers=2, parallel_backend=\"processes\"\n",
+    ")\n",
     "assert session.exit_code == ExitCode.OK"
    ]
   }

tests/test_jupyter/test_functional_interface_w_relative_path.ipynb

@@ -44,7 +44,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "session = pytask.build(tasks=[create_file, create_text], n_workers=2)\n",
+    "session = pytask.build(\n",
+    "    tasks=[create_file, create_text], n_workers=2, parallel_backend=\"processes\"\n",
+    ")\n",
     "assert session.exit_code == ExitCode.OK"
    ]
   }