在Tkinter树视图中显示字典键

import tkinter as tk
from tkinter import ttk

window = tk.Tk()
window.title("Tree View Example")

tree = ttk.Treeview(window)
tree.pack()

def display_dict_keys(dictionary, parent=''):
    for key in dictionary.keys():
        item_id = tree.insert(parent, 'end', text=key)
        if isinstance(dictionary[key], dict):
            display_dict_keys(dictionary[key], item_id)

example_dict = {
    'key1': 'value1',
    'key2': 'value2',
    'key3': {
        'subkey1': 'subvalue1',
        'subkey2': 'subvalue2'
    }
}

display_dict_keys(example_dict)

window.mainloop()