novaclient error

gistfile1.txt

from novaclient import client
yolomid = client.Client("2.0", "ID", "XXXXXXXXX", "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX", "https://identity.fr1.cloudwatt.com/v2.0")
yolomid.keypairs.list()

Traceback (most recent call last):
  File "openstackCW.py", line 15, in <module>
    yolomid.keypairs.list()
  File "/usr/local/lib/python2.7/dist-packages/novaclient/api_versions.py", line 370, in substitution
    return methods[-1].func(obj, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/v2/keypairs.py", line 156, in list
    return self._list('/%s' % self.keypair_prefix, 'keypairs')
  File "/usr/local/lib/python2.7/dist-packages/novaclient/base.py", line 201, in _list
    _resp, body = self.api.client.get(url)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 448, in get
    return self._cs_request(url, 'GET', **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 404, in _cs_request
    self.authenticate()
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 561, in authenticate
    auth_url = self._v2_auth(auth_url)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 652, in _v2_auth
    return self._authenticate(url, body)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 665, in _authenticate
    **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 399, in _time_request
    resp, body = self.request(url, method, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/client.py", line 393, in request
    raise exceptions.from_response(resp, body, url, method)
  File "/usr/local/lib/python2.7/dist-packages/novaclient/exceptions.py", line 274, in from_response
    message = error.get('message')
AttributeError: 'unicode' object has no attribute 'get'