Use black formatter

- Adjust isort/flake8 configuration
- Format everything using black
- Add auto formatting to pre-commit hook

.pre-commit-config.yaml

@@ -5,12 +5,16 @@ repos:
     rev: 5.9.3
     hooks:
       - id: isort
+  - repo: https://github.com/psf/black
+    rev: 21.9b0
+    hooks:
+      - id: black
   - repo: https://github.com/PyCQA/flake8
     rev: 3.9.2
     hooks:
       - id: flake8
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.2.0
+    rev: v4.0.1
     hooks:
       - id: check-docstring-first
       - id: check-merge-conflict

config/celery_app.py

@@ -18,10 +18,10 @@ def on_celery_setup_logging(**kwargs):
     # Patch all the code to use Celery logger (if not just logs inside tasks.py are displayed with the
     # task_id and task_name). This way every log will have the context information
     if not settings.CELERY_ALWAYS_EAGER:
-        for _, logger in settings.LOGGING['loggers'].items():
-            key = 'handlers'
+        for _, logger in settings.LOGGING["loggers"].items():
+            key = "handlers"
             if key in logger:
-                logger[key] = ['celery_console']
+                logger[key] = ["celery_console"]
         dictConfig(settings.LOGGING)