async blog tornado example

tornado_example.py

import tornado.ioloop
from tornado.httpclient import AsyncHTTPClient
urls = ['http://www.google.com', 'http://www.yandex.ru', 'http://www.python.org']

def handle_response(response):
    if response.error:
        print("Error:", response.error)
    else:
        url = response.request.url
        data = response.body
        print('{}: {} bytes: {}'.format(url, len(data), data))

http_client = AsyncHTTPClient()
for url in urls:
    http_client.fetch(url, handle_response)
    
tornado.ioloop.IOLoop.instance().start()