Update python-tests.yml

Author: jsiegle

.github/workflows/python-tests.yml

@@ -19,17 +19,27 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    
     - name: Install uv
       uses: astral-sh/setup-uv@v5
       with:
         enable-cache: true
         cache-dependency-glob: "uv.lock"
-    - name: Set up Python
-      run: uv python install
+
+    - name: Install Python (pin to a wheel-friendly version)
+        run: |
+          uv python install 3.12
+          uv python pin 3.12
+
+    - name: Create virtualenv
+        run: uv venv
+
+    - name: Preinstall h5py as wheel only
+        run: uv pip install --only-binary=:all: "h5py==3.13.0"
+
     - name: Install the project
-      run: |
-        uv pip install --only-binary=:all: "h5py==3.13.0"
-        uv sync --extra dev
-    - name: Run tests  
-      run: uv run pytest tests
+        run: uv sync --extra dev
+
+    - name: Run tests
+        run: uv run pytest tests