Finding local IP addresses using Python's stdlib

Question

How can I find local IP addresses (i.e. 192.168.x.x or 10.0.x.x) in Python platform independently and using only the standard library?

Answer 1

This answer is my personal attempt to solve the problem of getting the LAN IP, since socket.gethostbyname(socket.gethostname()) also returned 127.0.0.1. This method does not require Internet just a LAN connection. Code is for Python 3.x but could easily be converted for 2.x. Using UDP Broadcast:

import select
import socket
import threading
from queue import Queue, Empty

def get_local_ip():
        def udp_listening_server():
            s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            s.bind(('', 8888))
            s.setblocking(0)
            while True:
                result = select.select([s],[],[])
                msg, address = result[0][0].recvfrom(1024)
                msg = str(msg, 'UTF-8')
                if msg == 'What is my LAN IP address?':
                    break
            queue.put(address)

        queue = Queue()
        thread = threading.Thread(target=udp_listening_server)
        thread.queue = queue
        thread.start()
        s2 = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        s2.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
        waiting = True
        while waiting:
            s2.sendto(bytes('What is my LAN IP address?', 'UTF-8'), ('', 8888))
            try:
                address = queue.get(False)
            except Empty:
                pass
            else:
                waiting = False
        return address[0]

if __name__ == '__main__':
    print(get_local_ip())