如何在Tkinter中修改'askstring‘对话框的大小？在python中

import tkinter as tk
from tkinter import simpledialog

class CustomDialog(simpledialog.Dialog):
    def body(self, master):
        self.geometry("300x100")  # 设置对话框大小为300x100

        self.entry = tk.Entry(master)
        self.entry.pack()

    def apply(self):
        self.result = self.entry.get()

def open_custom_dialog():
    dialog = CustomDialog(root, title="Custom Dialog")
    result = dialog.result
    print("Result:", result)

root = tk.Tk()

button = tk.Button(root, text="Open Custom Dialog", command=open_custom_dialog)
button.pack()

root.mainloop()