Get IP address of network interface

ip.py

import socket
import fcntl
import struct
import sys
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(get_ip_address('eth0'))  # '192.168.0.110'


if __name__ == "__main__":

        print(get_ip_address(sys.argv[1]))