Python3 get interface IP address

getip.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import socket
import fcntl
import struct

def get_ip_address(ifname):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    fdsock = s.fileno()
    SIOCGIFADDR = 0x8915
    ifreq = struct.pack('16sH14s', bytes(ifname, 'utf-8'), socket.AF_INET, bytes('\x00'*14, 'utf-8'))
    try:
        res = fcntl.ioctl(fdsock, SIOCGIFADDR, ifreq)
    except:
        return None
    ip = struct.unpack('16sH2x4s8x', res)[2]
    return socket.inet_ntoa(ip)

print(get_ip_address('eth0'))