python 查找IP地址归属地

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#查找IP地址归属地
#writer by keery_log
#Create time:2013-10-30
#Last update:2013-10-30
#用法: python chk_ip.py www.google.com |python chk_ip.py 8.8.8.8 |python chk_ip.py ip.txt

import signal
import urllib
import json
import sys,os,re
import socket

if len(sys.argv) <= 1 :
    print "Please input ip address !"
    sys.exit(0)

def handler(signum, frame):
    sys.exit(0)
signal.signal(signal.SIGINT, handler)

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

#查找IP地址
def ip_location(ip):
    data = urllib.urlopen(url + ip).read()
    datadict=json.loads(data)

    for oneinfo in datadict:
        if "code" == oneinfo:
            if datadict[oneinfo] == 0:
                return datadict["data"]["country"] + datadict["data"]["region"] + datadict["data"]["city"] + datadict["data"]["isp"]

#定义IP与域名正则
re_ipaddress = re.compile(r'^((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$')
re_domain = re.compile(r'[a-zA-Z0-9][-a-zA-Z0-9]{0,62}(\.[a-zA-Z0-9][-a-zA-Z0-9]{0,62})+\.?')

if os.path.isfile(sys.argv[1]):  #如果参数是文件,迭代查找
    file_path = sys.argv[1]
    fh = open(file_path,'r')
    for line in fh.readlines():
        if re_ipaddress.match(line):
            city_address = ip_location(line)
            print line.strip() + ":" + city_address
else:
    ip_address = sys.argv[1]
    if re_ipaddress.match(ip_address):  #如果参数是单个IP地址
        city_address = ip_location(ip_address)
        print ip_address + ":" + city_address
    elif(re_domain.match(ip_address)):  #如果参数是域名
        result = socket.getaddrinfo(ip_address, None)
        ip_address = result[0][4][0]
        city_address = ip_location(ip_address)
        print ip_address.strip() + ":" + city_address