Get IP address from python

Question

I'm trying to get the ip address associated with network interface without spawning additional processes in Linux:

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].encode('utf-8'))
        )[20:24])

But always getting this error:

struct.pack('256s', ifname[:15].encode('utf-8'))
OSError: [Errno 99] Cannot assign requested address

How can I solve this?

Solution

Translate host to ip :

import socket
print (socket.gethostbyname(socket.gethostname()))

To get host by name :

import socket
print (socket.gethostbyname("www.goole.com"))

Comments

[lichb0rn]

And what if I have multiple network interfaces without any internet connection?

[Ricky Levi]

the first comment returns 127.0.0.1 ....

[Mohith7548]

It always returns the output as '127.0.0.1'. But I need both public and private IP addresses.

[An0n]

Do you have a working internet connection?