tornado:构造一个分级路由

# coding: utf-8
from __future__ import unicode_literals
from importlib import import_module
def include(module):
    res = import_module(module)
    urls = getattr(res, 'urls')
    return urls

def url_wrapper(urls):
    wrapper_list = []
    for url in urls:
        path, handles = url
        if isinstance(handles, (tuple, list)):
            for handle in handles:
                pattern, handle_class = handle
                wrap = ('{0}{1}'.format(path, pattern), handle_class)
                wrapper_list.append(wrap)
        else:
            wrapper_list.append((path, handles))
            print(wrapper_list)
    return wrapper_list

from __future__ import unicode_literals
from index import IndexHandler, Reverse
urls = [
    (r'hello/(\w+)', IndexHandler),
    (r'reverse/(\w+)', Reverse),
]

import tornado.web

class IndexHandler(tornado.web.RequestHandler):
    def get(self, name):
        greeting = self.get_argument('greeting', 'Hello')
        self.write(greeting + '{}, friendly user!'.format(name))

class Reverse(tornado.web.RequestHandler):
    def get(self, input_str):
        self.write(input_str[::-1])

# coding: utf-8
from __future__ import unicode_literals
import tornado.httpserver
import tornado.ioloop
import tornado.web
from url_router import include, url_wrapper
from controllers.test_hello.index import IndexHandler

from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)

application = tornado.web.Application(url_wrapper([
    (r"/(\w+)", IndexHandler),
    (r"/test/", include('controllers.test_hello.urls')),
]))

if __name__ == "__main__":
    http_server = tornado.httpserver.HTTPServer(application)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()