refactor accel

.github/workflows/test.yml

@@ -22,10 +22,10 @@ jobs:
     steps:
     - name: Checkout Code
       uses: actions/checkout@v2
-    - name: Set up Python 3.8
+    - name: Set up Python 3.9
       uses: actions/setup-python@v2
       with:
-        python-version: 3.8
+        python-version: 3.9
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip