如何在Python中禁用checkboxtreeview小部件中的复选框

from tkinter import *
from tkinter import ttk

root = Tk()
tree = ttk.CheckboxTreeview(root)

tree.insert("", "0", "item1", text="Item 1")
tree.insert("item1", "end", "subitem1", text="Subitem 1")
tree.insert("item1", "end", "subitem2", text="Subitem 2")
tree.insert("", "1", "item2", text="Item 2")
tree.insert("item2", "end", "subitem3", text="Subitem 3")
tree.insert("item2", "end", "subitem4", text="Subitem 4")

tree.item("item1", tags=("disabled",))
tree.item("subitem1", tags=("disabled",))

def disable_checkbox(item):
    if "disabled" in tree.item(item, "tags"):
        tree.item(item, tags=())
    else:
        tree.item(item, tags=("disabled",))

tree.bind("<Double-1>", lambda event: disable_checkbox(tree.focus()))

root.mainloop()