Update main.yml

.github/workflows/main.yml

@@ -10,6 +10,8 @@ jobs:
       - uses: actions/checkout@v2
       - name: Run a one-line script
         run: echo Hello, world!
+      - name: Python Black
+        uses: cytopia/docker-black@0.10
       - uses: actions/checkout@master
       - name: copy file via ssh password
         uses: appleboy/scp-action@master