Get local IP in Python

This is a cool code snippet I have used on several occasions for Python projects that need to figure out what the IP of the device they are running on is.

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])

ip_address = get_ip_address('wlan0')

print(ip_address)