from boto.ec2.connection import EC2Connection 
import os

myid=os.environ['NIMBUS_IAAS_ACCESS_KEY'] 
mypw=os.environ['NIMBUS_IAAS_SECRET_KEY'] 
host = 'svc.uc.futuregrid.org'
#host = 's83r.idp.sdsc.futuregrid.org' 

ec2conn = EC2Connection(myid, mypw, host=host, port=8444)
ec2conn.host = host

ec2conn.host = host

all_inst = ec2conn.get_all_instances()
print "Showing all of your current instances"

for res in all_inst: 
    # each reservation have a instance: 
    for instance in res.instances: 
        print "\t%s : %s : %s" % (instance.id, instance.state, instance.public_dns_name)