#!/usr/bin/env python# -*- coding:utf-8 -*-from concurrent.futures import ThreadPoolExecutor#线程池,导入模块import timedef task(hostname):    '''    假设这里是要提交的任务    :param hostname:     :return:     '''    time.sleep(2)    print(hostname)#创建线程池线程数自定义，要看主机性能，例如创建20个线程pool = ThreadPoolExecutor(20)for i in range(1,101):    #100个任务    hostname = 'c{}.com'.format(i)    pool.submit(task,hostname