Python 3.5+ Async I/O Web Requests

async-client.py

#!/usr/bin/env python3

## Run
# docker run --rm -it -v `pwd`:/app -w /app python:3.5.2-slim /bin/bash
# pip install aiohttp uvloop
# python async-client.py

## References
# http://aiohttp.readthedocs.io/en/stable/
# https://github.com/MagicStack/uvloop

import aiohttp
import asyncio
import async_timeout

import uvloop
asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())

async def fetch(session, url):
    with async_timeout.timeout(10):
        async with session.get(url) as response:
            return await response.text()

async def main(loop):
    async with aiohttp.ClientSession(loop=loop) as session:
        html = await fetch(session, 'http://python.org')
        print(html)

loop = asyncio.get_event_loop()
loop.run_until_complete(main(loop))