Django Design Patterns and Best Practices: Industry-standard web development techniques and solutions using Python, 2nd Edition

by Arun Ravindran

import asyncio import aiohttp from time import time sites = [ "http://news.ycombinator.com/", "https://www.yahoo.com/", "http://www.aliexpress.com/", "http://deelay.me/5000/http://deelay.me/", ] async def find_size(session, url): async with session.get(url) as response: page = await response.read() return len(page) async def show_size(session, url): size = await find_size(session, url) print("Read {:8d} chars from {}".format(size, url)) async def main(loop): async with aiohttp.ClientSession() as session: tasks = [] for site in sites: tasks.append(loop.create_task(show_size(session, site))) await asyncio.wait(tasks)

Clean example of async client