added flake8/black, pre-commit integration for flake8/black, and black formatting changes

daemon/.pre-commit-config.yaml

@@ -7,3 +7,18 @@ repos:
     language: system
     entry: bash -c 'cd daemon && pipenv run isort --atomic -y'
     types: [python]
+
+  - id: black
+    name: black
+    stages: [commit]
+    language: system
+    entry: bash -c 'cd daemon && pipenv run black --exclude ".+_pb2.*.py|doc|build|utm\.py" .'
+    types: [python]
+
+  - id: flake8
+    name: flake8
+    stages: [commit]
+    language: system
+    entry: bash -c 'cd daemon && pipenv run flake8'
+    types: [python]
+    exclude: setup.py