以下是一个示例代码，其中包含一组相关对象，并且当向组中添加或移除对象时，这些对象将被更新。

class Object:
    def __init__(self, name):
        self.name = name
    
    def update(self):
        print(f"{self.name} has been updated.")

class ObjectGroup:
    def __init__(self):
        self.objects = []
    
    def add_object(self, obj):
        self.objects.append(obj)
        obj.update()
    
    def remove_object(self, obj):
        self.objects.remove(obj)
        print(f"{obj.name} has been removed.")
    
    def update_all(self):
        for obj in self.objects:
            obj.update()

# 创建一组相关对象
object1 = Object("Object 1")
object2 = Object("Object 2")
object3 = Object("Object 3")

# 创建对象组并向其中添加对象
group = ObjectGroup()
group.add_object(object1)
group.add_object(object2)
group.add_object(object3)

# 移除一个对象
group.remove_object(object2)

# 更新所有对象
group.update_all()

运行上述代码将输出以下结果：

Object 1 has been updated.
Object 2 has been updated.
Object 3 has been updated.
Object 2 has been removed.
Object 1 has been updated.
Object 3 has been updated.