context_processor for tornado framework

Question

How to implement context_processor or middleware for tornado python framework? I'd like to add common variable to base.html template. Without change all handlers bases classes.

Answer 1

It can be done like this:

class MyHandler(tornado.web.RequestHandler): 
    def render(self, *args, **kwargs): 
        kwargs['my_context_variable'] = 'context' 
        return super(MyHandler, self).render(*args, **kwargs)