def create_app()

in optional-kubernetes-engine/bookshelf/__init__.py [0:0]

• 33 lines of code
• 5 McCabe index (conditional complexity)

def create_app(config, debug=False, testing=False, config_overrides=None):
    app = Flask(__name__)
    app.config.from_object(config)

    app.debug = debug
    app.testing = testing

    if config_overrides:
        app.config.update(config_overrides)

    # Configure logging
    if not app.testing:
        logging.basicConfig(level=logging.INFO)

    # Setup the data model.
    with app.app_context():
        model = get_model()
        model.init_app(app)

    # Create a health check handler. Health checks are used when running on
    # Google Compute Engine by the load balancer to determine which instances
    # can serve traffic. Google App Engine also uses health checking, but
    # accepts any non-500 response as healthy.
    @app.route('/_ah/health')
    def health_check():
        return 'ok', 200

    # Initalize the OAuth2 helper.
    oauth2.init_app(
        app,
        scopes=['email', 'profile'],
        authorize_callback=_request_user_info)

    # Add a logout handler.
    @app.route('/logout')
    def logout():
        # Delete the user's profile and the credentials stored by oauth2.
        del session['profile']
        session.modified = True
        oauth2.storage.delete()
        return redirect(request.referrer or '/')

    # Register the Bookshelf CRUD blueprint.
    from .crud import crud
    app.register_blueprint(crud, url_prefix='/books')

    # Add a default root route.
    @app.route("/")
    def index():
        return redirect(url_for('crud.list'))

    # Add an error handler. This is useful for debugging the live application,
    # however, you should disable the output of the exception for production
    # applications.
    @app.errorhandler(500)
    def server_error(e):
        return """