线程池

import threadpool
import requests
from hashlib import md5

urls = [
    ‘http://www.178linux.com/wp-content/uploads/2018/02/5.jpg‘,
    ‘http://img1.imgtn.bdimg.com/it/u=1139158180,2224775217&fm=11&gp=0.jpg‘,
    ‘http://www.linuxidc.com/upload/2019_04/19041915053582.png‘,
    ‘http://www.veryxue.com/file/upload/201905/09/201804031578.jpg‘,
    ‘http://5b0988e595225.cdn.sohucs.com/images/20171209/8e81dcb041a9425c823daf6b6053e03b.jpg‘
]


def test(url):
    print(url)


pool = threadpool.ThreadPool(200)  # 最多启动200个线程，线程池的大小

reqs = threadpool.makeRequests(test, urls)  # 第一个参数是执行哪个函数，第二个是所有的数据

[pool.putRequest(r) for r in reqs]  # 和下面的是一样的
# for r in reqs:
#     pool.putRequest(r)

pool.wait()

print(‘over!!‘)