helper function to translate the name of a network card into a valid host name

def nic_name_to_host(nic_name):
	""" helper function to translate the name of a network card into a valid host name"""
	from netifaces import ifaddresses, AF_INET
	host = ifaddresses(nic_name).setdefault(AF_INET, [{'addr': 'No IP addr'}] )[0]['addr']
	return(host)