Add workflow for automatic formatting

.github/workflows/black.yml

@@ -0,0 +1,16 @@
+name: Black
+
+on: [push, pull_request]
+
+jobs:
+  format_code:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+      - run: pip install --upgrade pip
+      - run: pip install black[jupyter]
+      - run: black $(git ls-files '*.py' 'ipynb')