下面的代碼通過Tkinter制作windows窗口界面，然后時間了一個簡單的倒計時功能，代碼可以直接運行

# Countdown using Tkinter

from Tkinter import *

import time

import tkMessageBox

class App:

def __init__(self,master):

frame = Frame(master)

frame.pack()

self.entryWidget = Entry(frame)

self.entryWidget["width"] = 15

self.entryWidget.pack(side=LEFT)

self.hi_there = Button(frame, text="Start", command=self.start)

self.hi_there.pack(side=LEFT)

self.button = Button(frame, text="QUIT", fg="red", command=frame.quit)

self.button.pack(side=LEFT)

def start(self):

text = self.entryWidget.get().strip()

if text != "":

num = int(text)

self.countDown(num)

def countDown(self,seconds):

lbl1.config(bg='yellow')

lbl1.config(height=3, font=('times', 20, 'bold'))

for k in range(seconds, 0, -1):

lbl1["text"] = k

root.update()

time.sleep(1)

lbl1.config(bg='red')

lbl1.config(fg='white')

lbl1["text"] = "Time up!"

tkMessageBox.showinfo("Time up!","Time up!")

def GetSource():

get_window = Tkinter.Toplevel(root)

get_window.title('Source File?')

Tkinter.Entry(get_window, width=30,

textvariable=source).pack()

Tkinter.Button(get_window, text="Change",

command=lambda: update_specs()).pack()

root = Tk()

root.title("Countdown")

lbl1 = Label()

lbl1.pack(fill=BOTH, expand=1)

app = App(root)

root.mainloop()

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