异步协程方式下载图片

import asyncio
import aiohttp


async def request_url(sessison, url):
    print("正在下载：%s" % url)
    async with sessison.get(url, verify_ssl=False) as response:
        content = await response.content.read()
        file_name = url.split("/")[-1]
        with open(file_name, "wb") as f:
            f.write(content)
        print("下载完成。。。")


async def downlowd():
    async with aiohttp.ClientSession() as session:
        urls = [
            "https://ns-strategy.cdn.bcebos.com/ns-strategy/upload/fc_big_pic/part-00584-2371.jpg",
            "https://ns-strategy.cdn.bcebos.com/ns-strategy/upload/fc_big_pic/part-00224-2122.jpg",
            "https://ns-strategy.cdn.bcebos.com/ns-strategy/upload/fc_big_pic/part-00252-2181.jpg"
        ]
        tasks = [
            asyncio.ensure_future(request_url(session, url)) for url in urls
        ]
        await asyncio.wait(tasks)

if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(downlowd())

注：我用的是python3.6版本，高版本的python在异步语法上有些区别