Get the ip address from a given interface

getip.py

# All credit goes to StackOverflow user tMC
# from http://stackoverflow.com/a/9267833

import socket, struct, fcntl
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sockfd = sock.fileno()
SIOCGIFADDR = 0x8915
def get_ip(iface = 'eth0'):
	ifreq = struct.pack('16sH14s', iface, socket.AF_INET, '\x00'*14)
	try:
		res = fcntl.ioctl(sockfd, SIOCGIFADDR, ifreq)
	except:
		return None
	ip = struct.unpack('16sH2x4s8x', res)[2]
	return socket.inet_ntoa(ip)

print get_ip('eth0')