python写的多线程访问网页工具

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很简单的多线程访问

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import urllib
import socket
from threading import *

url = "http://www.baidu.com/s?ie=UTF-8&wd=ypw"
cishu = 0
socket.setdefaulttimeout(15)

def gethtml():
    global cishu
    cishu += 1
    print cishu
    urllib.urlopen(url).read()

def attack():
    while True:
        try:
            gethtml()
        except error:
            pass

def run():
    t = Thread(target=attack)
    t.start()

for i in range(10):
    run()

值得注意的地方有:全局变量要用global,需要用try和timeout来防止线程崩溃