python-多任务编程-多进程下载图片

示例代码如下：

import requests
import multiprocessing

import time

# 下载歌曲
def downloader(item):
    resp = requests.get(item['song_link'])
    with open('./song/' + item['name'] + '.m4a', 'wb') as fp:
        print('正在下载', item['name'])
        fp.write(resp.content)


def main():
    urls = [
        {
            "name": "朋友",
            "song_link": "https://m701.music.126.net/20210326141615/978689dfbb858c4da53e50df6474cb60/jdyyaac/5653/525e/055d/a9454d96a2e420643b002734d6f7fe08.m4a"
        },
        {
            "name": "当年情",
            "song_link": "https://m701.music.126.net/20210326141615/978689dfbb858c4da53e50df6474cb60/jdyyaac/5653/525e/055d/a9454d96a2e420643b002734d6f7fe08.m4a"
        },
        {
            "name": "Monical",
            "song_link": "https://m10.music.126.net/20210326141848/1e966464daff62a40571991f73219c7b/yyaac/obj/wonDkMOGw6XDiTHCmMOi/3082407828/2766/750d/e2ab/8daef342fd1e3b4ff25a36055bd58efd.m4a"
        },
        {
            "name": "朋友别哭",
            "song_link": "https://m801.music.126.net/20210326141938/ed9ab9235cd76d5184eaa561fe6de4b0/jdyyaac/525c/540f/0f5d/e684123968ce2568614a87e2c31a2814.m4a"
        }
    ]
    start_time = time.time()
    # 开启6个进程
    pool = multiprocessing.Pool(6)
    for item in urls:
        # downloader(item)
        pool.apply_async(func=downloader, args=(item, ))

    pool.close()
    pool.join()

    end_time = time.time()

    print('下载总耗时', end_time - start_time)


if __name__ == '__main__':
    main()