Reformat with black

https://github.com/python/black

examples/tutorial/flaskr/__init__.py

@@ -8,14 +8,14 @@ def create_app(test_config=None):
     app = Flask(__name__, instance_relative_config=True)
     app.config.from_mapping(
         # a default secret that should be overridden by instance config
-        SECRET_KEY='dev',
+        SECRET_KEY="dev",
         # store the database in the instance folder
-        DATABASE=os.path.join(app.instance_path, 'flaskr.sqlite'),
+        DATABASE=os.path.join(app.instance_path, "flaskr.sqlite"),
     )
 
     if test_config is None:
         # load the instance config, if it exists, when not testing
-        app.config.from_pyfile('config.py', silent=True)
+        app.config.from_pyfile("config.py", silent=True)
     else:
         # load the test config if passed in
         app.config.update(test_config)
@@ -26,16 +26,18 @@ def create_app(test_config=None):
     except OSError:
         pass
 
-    @app.route('/hello')
+    @app.route("/hello")
     def hello():
-        return 'Hello, World!'
+        return "Hello, World!"
 
     # register the database commands
     from flaskr import db
+
     db.init_app(app)
 
     # apply the blueprints to the app
     from flaskr import auth, blog
+
     app.register_blueprint(auth.bp)
     app.register_blueprint(blog.bp)
 
@@ -43,6 +45,6 @@ def create_app(test_config=None):
     # in another app, you might define a separate main index here with
     # app.route, while giving the blog blueprint a url_prefix, but for
     # the tutorial the blog will be the main index
-    app.add_url_rule('/', endpoint='index')
+    app.add_url_rule("/", endpoint="index")
 
     return app