A customer came to me today complaining about his code not working. He’d forgot to include the ‘account-number’, also refered to as the project_id in openstack. Without it, your going to get HTTP 405, i.e. MethodNotAllowed: Method Not Allowed (HTTP 405)

from novaclient import client

nova = client.Client ("2" ,"username", "password", "account-number", "https://lon.identity.api.rackspacecloud.com/v2.0")

list = nova.servers.list()

print list

This does what it says on the tin, queries the API using nova python module to extract server list.