adding a Python code-formatting check for CI

Signed-off-by: Karl W Schulz <[email protected]>

.github/workflows/formatting.yml

@@ -0,0 +1,51 @@
+name: Formatting
+
+on:
+  push:
+    branches: [ main, dev ]
+  pull_request:
+    branches: [ main, dev ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  python:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: [3.9]
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        python -m pip install black
+        if [ -f requirements.txt ]; then python -m pip install -r requirements.txt; fi
+    - name: black format
+      run: |
+        black --diff --check .
+
+  python-bytecode:
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: find-bytecode
+      run: |
+        set +e
+        FILES=$(find . -type f | egrep '__pycache__|\.pyc$')
+        if [ -n "${FILES}" ]; then
+          echo -e "\nError! Python bytecode included in commit\n"
+          echo -e "### FILES: ###"
+          echo -e "${FILES}"
+          echo -e "##############"
+          exit 1
+        fi