"""
单进程

"""
from multiprocessing import Process
from os import getpid
from random import randint
from time import time, sleep


def download_task(filename):
    print(‘启动下载进程，进程号[%d].‘ % getpid())
    print(‘开始下载%s...‘ % filename)
    time_to_download = randint(5, 10)
    sleep(time_to_download)
    print(‘%s下载完成! 耗费了%d秒‘ % (filename, time_to_download))


def main():
    start = time()
    p1 = Process(target=download_task, args=(‘Python从入门到住院.pdf‘, ))
    p1.start()
    p2 = Process(target=download_task, args=(‘Peking Hot.avi‘, ))
    p2.start()
    p1.join()
    p2.join()
    end = time()
    print(‘总共耗费了%.2f秒.‘ % (end - start))


if __name__ == ‘__main__‘:
    main()

此处为以上代码运行一次的结果：
启动下载进程，进程号[1420].
开始下载Python从入门到住院.pdf...
启动下载进程，进程号[1431].
开始下载Peking Hot.avi...
Peking Hot.avi下载完成! 耗费了6秒
Python从入门到住院.pdf下载完成! 耗费了11秒
总共耗费了11.01秒.

"""
多进程

"""
# 多进程的库
from multiprocessing import Process
from random import randint
from time import time, sleep
import os


def download_task(filename):
    print(‘开始下载%s‘ % filename)
    time_to_download = randint(5, 10)
    sleep(time_to_download)
    print(‘%s 下载完成,经过%d秒‘ % (filename, time_to_download))


def main():

    start = time()
    # 开启两个多进程，     函数名              传递的参数,需要注意的是,它接受的是一个元组(tuple)
    p1 = Process(target=download_task, args=(‘论.......mp4‘, ))
    p2 = Process(target=download_task, args=(‘l论.......mp5‘, ))
    # 获取进程号

    # 启动进程
    p1.start()
    p2.start()

    ##############
    # 进程阻塞.
    p1.join()
    p2.join()
    ##############
    end = time()
    print(end - start)


if __name__ == ‘__main__‘:
    main()

import requests

url = ‘http://op.hanhande.net/shtml/op_wz/list_2602_2.shtml‘
response = requests.get(url)
response.encoding = ‘gbk‘
HTML = response.text
print(HTML)