python获取网卡IP地址

#!/usr/bin/env python 
# -*- coding: utf-8 -*- 
 
import socket 
import fcntl 
import struct 
 
def get_ip_address(ifname): 
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
    return socket.inet_ntoa(fcntl.ioctl( 
        s.fileno(), 
        0x8915,  # SIOCGIFADDR 
        struct.pack('256s', ifname[:15]) 
    )[20:24]) 
 
print "eth0 = "+ get_ip_address('eth0') 
print "lo = " + get_ip_address('lo')