如何在设置空间中移动tkinter行的列表？

listbox = Listbox(root)
listbox.pack()

data = ["Item 1", "Item 2", "Item 3", "Item 4"]

for item in data:
    listbox.insert(END, item)

def move_up():
    selected_index = listbox.curselection()
    if selected_index:
        if selected_index[0] > 0:
            item = listbox.get(selected_index)
            listbox.delete(selected_index)
            listbox.insert(selected_index[0]-1, item)

def move_down():
    selected_index = listbox.curselection()
    if selected_index:
        if selected_index[0] < listbox.size() - 1:
            item = listbox.get(selected_index)
            listbox.delete(selected_index)
            listbox.insert(selected_index[0]+1, item)

button_up = Button(root, text="Move Up", command=move_up)
button_up.pack()

button_down = Button(root, text="Move Down", command=move_down)
button_down.pack()