#!/usr/bin/python

import plistlib

plist = plistlib.Plist.fromFile('/Library/Preferences/SystemConfiguration/preferences.plist')

CurrentSet = plist['CurrentSet']

serviceOrder = plist['Sets'][CurrentSet[6:]]['Network']['Global']['IPv4']['ServiceOrder']

for key in serviceOrder:
        configMethod = plist['NetworkServices'][key]['IPv4']['ConfigMethod']
        if configMethod == "Manual":
                ip = plist['NetworkServices'][key]['IPv4']['Addresses'][0]

print ip + '\n'