当用户单击tkinter中的错误消息框时，将焦点放在空的输入框中

from tkinter import messagebox

def show_error_message():
    messagebox.showerror("Error", "Please fill in the required fields.")

from tkinter import Entry

def show_error_message():
    messagebox.showerror("Error", "Please fill in the required fields.")
    empty_entry.focus_set()

from tkinter import Button, Entry, messagebox

def show_error_message():
    messagebox.showerror("Error", "Please fill in the required fields.")
    empty_entry.focus_set()

root = Tk()

empty_entry = Entry(root)
empty_entry.pack()

error_button = Button(root, text="Show Error", command=show_error_message)
error_button.pack()

root.mainloop()