settings = {'debug': True, 'static_path': os.path.join(PATH, 'static')}
handlers = [('/', WebHandler), ('/(favicon\\.ico)', tornado.web.
    StaticFileHandler, {'path': favicon_path})]
application = tornado.web.Application(handlers, **settings)
Using Tornado, how do I serve static files and serve a favicon.ico from a different directory than the static path?