IP=`ifconfig | grep 'inet addr:' | cut -d: -f2 | grep -v ^10. | grep -v ^192.168 | grep -v ^172. | 
grep -v ^127. | awk '{print $1}' | awk '{print;exit}'`
 
[ ! -n "$IP" ] && IP=`ifconfig | grep 'inet addr:' | cut -d: -f2 | grep -v ^127. | 
awk '{print $1}' | awk '{print;exit}'`

#!/usr/bin/env python
import socket
def Get_local_ip():
 """
 Returns the actual ip of the local machine.
 This code figures out what source address would be used if some traffic
 were to be sent out to some well known address on the Internet. In this
 case, a Google DNS server is used, but the specific address does not
 matter much. No traffic is actually sent.
 """
 try:
  csock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  csock.connect(('8.8.8.8', 80))
  (addr, port) = csock.getsockname()
  csock.close()
  return addr
 except socket.error:
  return "127.0.0.1"
 
if __name__ == "__main__":
 local_IP = Get_local_ip() 
 print local_IP

#!/usr/bin/env python
import re,urllib2
class Get_public_ip:
 def getip(self):
  try:
   myip = self.visit("http://www.whereismyip.com/")
  except:
   try:
    myip = self.visit("http://www.ip138.com/ip2city.asp")
   except:
    myip = "So sorry!!!"
  return myip
 def visit(self,url):
  opener = urllib2.urlopen(url)
  if url == opener.geturl():
   str = opener.read()
  return re.search('d+.d+.d+.d+',str).group(0)
 
if __name__ == "__main__":
 getmyip = Get_public_ip()
 print getmyip.getip()

#!/usr/bin/env python
#coding:utf-8
try:
 import sys,urllib2,json
 apiurl = "http://ip.taobao.com/service/getIpInfo.php?ip=%s" % sys.argv[1] 
 content = urllib2.urlopen(apiurl).read()
 data = json.loads(content)['data']
 code = json.loads(content)['code']
 if code == 0:
  print data['country_id']
 else:
  print data
except:
 print "Usage:%s IP" % sys.argv[0]