Check code with black

.github/workflows/hf-sync.yml

@@ -25,6 +25,9 @@ jobs:
           python -m pip install --upgrade pip
           pip install pytest
           pip install -r requirements-test.txt
+      - name: Check code with black
+        run: |
+           black --check .
       #- name: Lint with flake8
       #  run: |
       #    # stop the build if there are Python syntax errors or undefined names