python中的协程

引子

# -*-coding:utf-8-*-
# Author:Lai
import aiohttp, aiofiles, asyncio


# 下载器
async def fetch(session, url):
    async with session.get(url) as resp:
        return await resp.read()


# 单个任务
async def main1():
    async with aiohttp.ClientSession() as session:
        url = "https://www.xxx.com"
        res = await fetch(session, url)
        print(res.decode("GBK"))


# 多个任务
async def main2():
    async with aiohttp.ClientSession() as session:
        urls = ["https://www.xxx1.com","https://www.xxx2.com"]
        tasks = [asyncio.create_task(fetch(session, url)) for url in urls]
        b_list = await asyncio.gather(*tasks)



if __name__ == "__main__":
    asyncio.run(main1())
    # asyncio.run(main1())

python中的协程

原文：https://www.cnblogs.com/lilied/p/13583515.html