Python 3.5 增加了对async def and await的支持，同样的异步代码看起来干净了很多，也更易读。

import aiohttp
import asyncio

async def get_status(url, id):
    r = await aiohttp.get(url)
    print(r.status, id)
    r.close()


tasks = []
for i in range(100):
    tasks.append(asyncio.ensure_future(get_status('https://api.github.com/events', id=i)))


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(asyncio.wait(tasks))
    loop.close()

原文链接：http://leeeric.com/post/asynchronous-http-requests-in-Python-3-5/