Consider this middleware code:

Consider this middleware code:

class TimingMiddleware:
    def __init__(self, app):
        self.app = app
    def __call__(self, environ, start_response):
        print('Start')
        result = self.app(environ, start_response)
        print('End')
        return result

app.wsgi_app = TimingMiddleware(app.wsgi_app)

What will be printed when a request is processed?