def unbind_tags(self):
    #设置你要操作的instance_id
    instance_id = 'your-choose-instance-id'
    #设置你要解绑的标签
    change_tags = [{"tagKey" : "test_key", "tagValye" : "test_val"}]
    self.client.unbind_tags(instance_id = instance_id, change_tags = change_tags)