python&[aiohttp , aiofiles]案例

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aiohttp , aiofiles 安装

网址

图片链接

# aiohttp , aiofiles

import asyncio
import aiohttp
import aiofiles

"""
复制图片地址
'https://img2.baidu.com/it/u=1395158804,2693158229&fm=253&fmt=auto&app=138&f=JPEG?w=775&h=500',
'https://img0.baidu.com/it/u=1667622076,2227534038&fm=253&fmt=auto&app=138&f=JPEG?w=703&h=500',
'https://img0.baidu.com/it/u=350325469,2139949192&fm=253&fmt=auto&app=138&f=JPEG?w=400&h=591',
'https://img2.baidu.com/it/u=1028008341,3813970040&fm=253&fmt=auto&app=138&f=JPEG?w=738&h=500',

"""

async def download(url):
    print("开始下载",url)
    # file_name = url.split("/")[-1]
    # 相当于requests
    async with aiohttp.ClientSession() as session:
        # 发送网络请求
        async with session.get(url) as resp:
            # await resp.text() # => resp.text
            content = await resp.content.read() # =>resp.content
            # await resp.json()
            # 写入文件
            # f = open("top250.csv",mode='w',encoding='utf-8')
            async with aiofiles.open("123.csv",mode='wb',encoding='utf-8') as f:
                await f.write(content)

    print("下载完成",url)


async def main():
    url_list=[
        'https://img2.baidu.com/it/u=1395158804,2693158229&fm=253&fmt=auto&app=138&f=JPEG?w=775&h=500',
        'https://img0.baidu.com/it/u=1667622076,2227534038&fm=253&fmt=auto&app=138&f=JPEG?w=703&h=500',
        'https://img0.baidu.com/it/u=350325469,2139949192&fm=253&fmt=auto&app=138&f=JPEG?w=400&h=591',
        'https://img2.baidu.com/it/u=1028008341,3813970040&fm=253&fmt=auto&app=138&f=JPEG?w=738&h=500',

    ]
    tasks = []
    for url in url_list:
        t = asyncio.create_task(download(url))
        tasks.append(t)
    await asyncio.wait(tasks)


if __name__ == '__main__':
    asyncio.run(main())

运行结果

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