def update_vertex(self, _id, data, keys=None):
        data = self._remove_null_values(data)
        path = build_path(vertex_path,_id)
        return self.request.put(path,data)
Updates the vertex with the _id and returns the Response.
dataset/ETHPy150Open espeed/bulbs/bulbs/rexster/client.py/RexsterClient.update_vertex