skip openspiel notebook test on Windows GH action and add minimal dependencies for other tutorials

Author: edwardchalstrey1

.github/workflows/python.yml

@@ -102,7 +102,7 @@ jobs:
           python -m pip install --upgrade pip
           pip install setuptools build cython wheel
           pip install -r tests/requirements.txt
-          pip install -r doc/requirements.txt
+          pip install nbformat nbclient ipykernel jupyter matplotlib
       - name: Build extension
         run: |
           python -m pip install -v .

tests/test_tutorials.py

@@ -50,6 +50,11 @@ def test_execute_notebook(nb_path):
     if sys.version_info < (3, 12):
         pytest.skip("Notebook execution tests require Python 3.12 or newer")
 
+    # Skip OpenSpiel notebook on Windows
+    # (OpenSpiel is not available on Windows without manual install)
+    if sys.platform == "win32" and "openspiel" in nb_path.name.lower():
+        pytest.skip("OpenSpiel notebook requires OpenSpiel, which is not available on Windows")
+
     nb = nbformat.read(str(nb_path), as_version=4)
 
     # Prefer the notebook's kernelspec if provided, otherwise let nbclient pick the default.