def set_data_3d(self, *args):         if len(args) == 1:            args = args[0]        for name, xyz in zip('xyz', args):            if not np.iterable(xyz):                raise RuntimeError(f'{name} must be a sequence')        self._verts3d = args        self.stale = True

    def set_data_3d(self, *args):        if len(args) == 1:            self._verts3d = args[0]        else:            self._verts3d = args        self.stale = True

e.g.set_data_3d(0.94,-0.26,0.22)