如何将文本添加到tkinter GUI中的条目中，然后在用户与小部件交互时使其消失？

import tkinter as tk

root = tk.Tk()
entry = tk.Entry(root)
entry.pack()

def clear_entry(event):
    entry.delete(0, tk.END)

entry.bind("<Button-1>", clear_entry)

root.mainloop()

import tkinter as tk

def clear_entry(event):
    entry.delete(0, tk.END)

root = tk.Tk()
entry = tk.Entry(root)
entry.pack()
entry.bind("<Button-1>", clear_entry)
root.mainloop()