Enable black in the workflow to check formatting

Signed-off-by: Guillaume <[email protected]>

.github/workflows/format.yaml

@@ -3,6 +3,20 @@ name: Check coding style
 on: [push]
 
 jobs:
+  black:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install black
+        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+    - name: black
+      run: |
+        black --unstable .
   pycodestyle:
     runs-on: ubuntu-latest
     steps:

setup.cfg

@@ -1,6 +1,9 @@
 [pycodestyle]
 max-line-length=120
-ignore=E261,E302,E305,E402,W503
+ignore=E203,E261,E302,E305,E402,E701,W503
 
 [pydocstyle]
 ignore=D100,D101,D102,D103,D104,D105,D106,D107,D203,D210,D212,D401,D403
+
+[tool.black]
+line-length=120