cell.py

class CellById(base.Resource):

    def get(self, id):
        context = request.environ.get('context')
        try:
            cell_obj = dbapi.cells_get_by_id(context, id)
        except exceptions.NotFound:
            return self.error_response(404, 'Not Found')
        except Exception as err:
            LOG.error("Error during Cell get by id: %s" % err)
            return self.error_response(500, 'Unknown Error')

        cell_obj.data = cell_obj.variables
        cell = jsonutils.to_primitive(cell_obj)
        return cell, 200, None


     def put(self, id):
        """Update existing cell."""
#        ipdb.set_trace()
        id_keys = request.form.keys()
        values = dict((key, request.form.getlist(key)[0]) for key in id_keys)
        print values
        context = request.environ.get('context')
        try:
            dbapi.cells_update(context, id, values)
        except exceptions.NotFound:
            return self.error_response(404, 'Not Found')
        except Exception as err:
            LOG.error('Error during cell update: %s' % err)
            return self.error_response(500, 'Unknown Error')

        return None, 401, None

terminal

vagrant@vagrant-ubuntu-trusty-64:~/craton$ curl -i "http://${MY_IP}:8084/v1/cells/{4}" -XPUT -d '{"name": "DTW_3", "region_id": 7,"project_id": 1}' -H "Content-Type: application/json" -H "X-Auth-Token: demo" -H "X-Auth-User: demo" -H "X-Auth-Project: 1"
HTTP/1.0 500 INTERNAL SERVER ERROR
Date: Fri, 30 Sep 2016 18:53:54 GMT
Server: WSGIServer/0.1 Python/2.7.6
Content-Type: application/json
Content-Length: 51
x-openstack-request-id: req-9b84eee6-30bf-45f3-8a51-a433ffab9360

{"message": "`401` is not a defined status code."}