通过EntryBoxes向嵌套字典添加键和值，并通过组合框访问它

import tkinter as tk
from tkinter import messagebox

def add_key_value():
    key = key_entry.get()
    value = value_entry.get()
    
    nested_dict[key] = value
    
    messagebox.showinfo("Success", "Key-Value pair added successfully!")

def access_value():
    key = access_combobox.get()
    
    if key in nested_dict:
        value = nested_dict[key]
        messagebox.showinfo("Value", f"The value for key '{key}' is '{value}'")
    else:
        messagebox.showerror("Error", f"No value found for key '{key}'")

# 创建空的嵌套字典
nested_dict = {}

# 创建主窗口
window = tk.Tk()

# 创建键输入框
key_label = tk.Label(window, text="Key:")
key_label.pack()
key_entry = tk.Entry(window)
key_entry.pack()

# 创建值输入框
value_label = tk.Label(window, text="Value:")
value_label.pack()
value_entry = tk.Entry(window)
value_entry.pack()

# 创建添加键值按钮
add_button = tk.Button(window, text="Add Key-Value", command=add_key_value)
add_button.pack()

# 创建组合框
access_label = tk.Label(window, text="Access Key:")
access_label.pack()
access_combobox = tk.ttk.Combobox(window, values=list(nested_dict.keys()))
access_combobox.pack()

# 创建访问值按钮
access_button = tk.Button(window, text="Access Value", command=access_value)
access_button.pack()

# 运行主循环
window.mainloop()