python tornado异步_python tornado异步处理记录

单进程单线程。

import tornado.ioloop

import tornado.web

class MainHandler(tornado.web.RequestHandler):

def get(self):

time.sleep(10)

return "ok"

application = tornado.web.Application([

(r"/", MainHandler),

])

if __name__ == "__main__":

application.listen(58000)

tornado.ioloop.IOLoop.instance().start()

异步写法

#!/bin/env python

# -*- coding:utf-8 -*-

# Date: 2017-01-02

# Author: simonzhang

# web: www.simonzhang.net

# Email: [email protected]

## END INIT INFO

import tornado.ioloop

import tornado.web

import tornado.gen

from tornado.concurrent import run_on_executor

# 这个并发库在python3自带;在python2需要安装pip install futures

from concurrent.futures import ThreadPoolExecutor

import time

class MainHandler(tornado.web.RequestHandler):

#executor 是局部变量 不是全局的

executor = ThreadPoolExecutor(5)

@tornado.web.asynchronous

@tornado.gen.coroutine

def get(self):

res = yield self.sleep()

self.write("wait. %s" % res)

# 必须要结束

self.finish()

@run_on_executor

def sleep(self):

time.sleep(10)

return "ok"

application = tornado.web.Application([

(r"/", MainHandler),

])

if __name__ == "__main__":

application.listen(58000)

tornado.ioloop.IOLoop.instance().start()

来源：http://www.dongwm.com/archives/shi-yong-tornadorang-ni-de-qing-qiu-yi-bu-fei-zu-sai/