black format on pull request

.github/workflows/black.yaml

@@ -1,17 +1,25 @@
-name: Python Black
-
+name: black-action
 on: [push, pull_request]
-
 jobs:
-  lint:
-    name: Python Lint
+  linter_name:
+    name: runner / black
     runs-on: ubuntu-latest
     steps:
-      - name: Setup Python
-        uses: actions/setup-python@v1
-      - name: Setup checkout
-        uses: actions/checkout@master
-      - name: Lint with Black
-        run: |
-          pip install black
-          black --check dacapo tests
+      - uses: actions/checkout@v2
+      - name: Check files using the black formatter
+        uses: rickstaa/action-black@v1
+        id: action_black
+        with:
+          black_args: "."
+      - name: Create Pull Request
+        if: steps.action_black.outputs.is_formatted == 'true'
+        uses: peter-evans/create-pull-request@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: "Format Python code with psf/black push"
+          commit-message: ":art: Format Python code with psf/black"
+          body: |
+            There appear to be some python formatting errors in ${{ github.sha }}. This pull request
+            uses the [psf/black](https://github.com/psf/black) formatter to fix these issues.
+          base: ${{ github.head_ref }} # Creates pull request onto pull request or commit branch
+          branch: actions/black