在Python3.7中创建数字时钟

import tkinter as tk
from datetime import datetime

def update_clock():
    current_time = datetime.now().strftime("%H:%M:%S")
    clock_label.config(text=current_time)
    clock_label.after(1000, update_clock)

root = tk.Tk()
root.title("数字时钟")

clock_label = tk.Label(root, font=("Arial", 80), bg="white", fg="black")
clock_label.pack(padx=50, pady=50)

update_clock()

root.mainloop()