ip address ( python )

**astroalex** · August 2nd, 2008

Hello, i have a small question:

on windows the

Code:

socket.gethostbyname(socket.gethostname())

function would return my ip (eg 79.116.238.19) which i could use for a server ( socket.bind() )

on ubuntu i get the localhost address, thus rendering the server useless. i tried binding to my ip address directly or using the domain name from no-ip (something@no-ip.org -> ip address) but i get (99, 'Cannot assign requested address') error.

thanks in advance.

**sstvinc2** · August 2nd, 2008

I'm not sure exactly what you're trying to do here. If you're just trying to get your own machine's IP using python commands, maybe this little tweak (from http://mgltools.scripps.edu/document...p-using-python):

Code:

import socket
socket.gethostbyname(socket.gethostname())
socket.gethostbyname_ex(socket.gethostname())

I'm like hacks too, so I would probably try something like

Code:

os.system("ifconfig > file.txt")

and then read the text file, but that's obviously a crappy way to go about writing clean code.

**sstvinc2** · August 2nd, 2008

Nevermind, the gethostbyname_ex() doesn't work either. I'll keep poking around on the internet, but that hack of mine doesn't seem quite so terrible now...

**sstvinc2** · August 2nd, 2008

Ok, I think I got it this time (courtesy http://kryptoz.wordpress.com/2008/01...nd_ip_address/):

Code:

from socket import socket, SOCK_DGRAM, AF_INET
s = socket(AF_INET, SOCK_DGRAM)
s.connect(('google.com', 0))
s.getsockname()

I tried it out and it worked for me. Not sure why connecting to an external site (google here) is so important, but I ran across several people saying that it's necessary, so I suppose it is.

**astroalex** · August 2nd, 2008

Hey, thanks for answering. My actual problem was making socket.bind() to work with my ip address instead of localhost. I didn't really knew what was the problem, why socket.bind("",port) would not use my ip address so i asked why my ip retrieving method failed. Well, i tried your method and it worked. I can now see my ip and bind it so i can accept incoming connections.

Thanks a lot man, i really appreciate your help