gevent-demo.py

class WSGIApp(object):
    POST_PROCESSING_TIMEOUT = 3
    def async_response_handler(self, request, response):
        log.debug('Running async handler')
        time.sleep(2)
        log.debug('Finished async handler')
    def __call__(self, environ, start_response):
        # snip
        log.debug('Dispatching post-response handlers...')
        gevent.spawn(
            lambda *args, **kwargs: gevent.with_timeout(self.POST_PROCESSING_TIMEOUT,
                                                        self.async_response_handler, *args, **kwargs),
            request, response)
        log.debug('Rendering response...')
        return response(environ, start_response)

# log output reads....
DEBUG:base:Dispatching post-response handlers...
DEBUG:base:Running async handler
DEBUG:base:Finished async handler
DEBUG:base:Rendering response...