Given this middleware code, what will be printed when a request is made?

Given this middleware code, what will be printed when a request is made?

class LoggerMiddleware:
    def __init__(self, app):
        self.app = app
    def __call__(self, environ, start_response):
        print('Before request')
        response = self.app(environ, start_response)
        print('After request')
        return response

app.wsgi_app = LoggerMiddleware(app.wsgi_app)