python multiprocessing

mprocessingtaobaoip.py

#!/home/yinyong/app/python/bin/python
# -*- coding=utf-8 -*-
  
#module
import multiprocessing
import urllib2
import json
import os
import sys
reload(sys)
sys.setdefaultencoding('utf-8')

#Variable
url="http://ip.taobao.com/service/getIpInfo.php?ip="

#function
def getiplist(ipfile):
    f = open(ipfile,'r')
    iplist = f.readlines()
    f.close
    return iplist

def ip_detail(iplist):
    for ip in iplist:
        newip = ip.strip('\n')
        try:
            uri = url+newip
            request = urllib2.Request(uri)
            response = urllib2.urlopen(request,timeout=2)
            data = response.read()
            datadict = json.loads(data)
        #return u"该IP的详细信息为:\n" + u"国家/地区：" + datadict["data"]["country"] + "/" + datadict["data"]["area"] + u"\n省份：\t" + datadict["data"]["region"] + u"\n城市:\t" + datadict["data"]["city"] + u"\n运营商：" + datadict["data"]["isp"]
            result = newip + '\t' + datadict["data"]["country"] + "/" + datadict["data"]["area"] + "\t" + datadict["data"]["region"] + "/" + datadict["data"]["city"] + "\t"  + datadict["data"]["isp"]
            sys.stdout.write(unicode(result) + '\n')
        #RES.append(result)
        except:
            continue

iplist = getiplist(sys.argv[1])
leniplist = len(iplist)
procs_num = 100
procs = []
per_proc = leniplist/procs_num

for i in range(procs_num):
    if procs_num-i == 1:
        p = multiprocessing.Process(target=ip_detail,args=(iplist[i*per_proc:],))
    else:
        p = multiprocessing.Process(target=ip_detail,args=(iplist[i*per_proc:i*per_proc+per_proc],))
    procs.append(p)

for i in range(procs_num):
    procs[i].start()

for i in range(procs_num):
    procs[i].join()