gistfile1.txt

#!/usr/bin/env python

import xmlrpclib, httplib, sys
from operator import itemgetter

SATELLITE_URL = "http://xmlrpc.rhn.redhat.com/rpc/api"
SATELLITE_LOGIN = "RHN_USERNAME"
SATELLITE_PASSWORD = "RHN_PASSWORD"

client = xmlrpclib.Server(SATELLITE_URL, verbose=0)
key = client.auth.login(SATELLITE_LOGIN, SATELLITE_PASSWORD)
systems = client.system.listUserSystems(key,SATELLITE_LOGIN)

newlist = sorted(systems, key=itemgetter('last_checkin')) 
#for i in systems:
for i in newlist:
    print i.get('id'),i.get('name'),i.get('last_checkin')
        
client.auth.logout(key)