抓取西刺免费代理ip（未完成版，没加代理，没加验证）
import urllib2
import urllib
import re
num=50
for m in range(1,num):
url=\'http://www.xicidaili.com/nn/\'+str(m)
user_agent=\'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0\'
headers={\'User-agent\':user_agent}
httpHandler = urllib2.HTTPHandler(debuglevel=1)
httpsHandler = urllib2.HTTPSHandler(debuglevel=1)
opener = urllib2.build_opener(httpHandler, httpsHandler)
urllib2.install_opener(opener)
req=urllib2.Request(url,headers=headers)
try:
r=urllib2.urlopen(req,timeout=30000)
#print r.read()
except urllib2.URLError,e:
print url
print e.code
continue
tmp=r.read()
zzip=\'<td>[0-9]*.[0-9]*.[0-9]*.[0-9]*</td>\s*<td>[0-9]*</td>\'
zzport=\'<td>[0-9]*</td>\'
ip=re.findall(zzip,tmp)
port=re.findall(zzport,tmp)
lip=[]
lport=[]
for i in ip:
lip.append(i.replace(\'<td>\',\'\').replace(\'</td>\s*<td>[0-9]*</td>\',\'\'))
for j in port:
lport.append(j.replace(\'<td>\',\'\').replace(\'</td>\',\'\'))
d={}
n=0
for i in ip:
d[n]=dict(ip=lip[n],port=lport[n])
n=n+1
print d