Python Tornado updating shared data between requests

Question

I have a Python Tornado app. The app contains request handlers, for which I am passing data to like (the code below is not complete, and is just to illustrate what I want):

Answer 1

Another strategy, in addition to what dano mentions above is to attach the shared data to the Application object.

class MyApplication(tornado.web.Application):

    def __init__(self):

       self.shared_attribute = foo;

        handlers = [#your handlers here]        
        settings = dict(#your application settings here)
        super().__init__(handlers, **settings)


server = tornado.httpserver.HTTPServer(MyApplication())
server.listen(8888)
tornado.ioloop.IOLoop.instance().start()

Next you can access shared_attribute defined above in all your request handlers using self.application.shared_attribute.

You update it at one place and it immediately reflects in all your subsequent calls to the request handlers.