[Traceback (most recent call last):
  File "main.py", line 25, in <module>
    print(nova_client.hosts.list())
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v1_1/hosts.py", line 24, in __repr__
    return "<Host: %s>" % self.host
  File "/usr/local/lib/python2.7/dist-packages/novaclient/openstack/common/apiclient/base.py", line 489, in __getattr__
    raise AttributeError(k)
AttributeError: host