python开发的简单窗口界面的倒计时界面，python倒计时,# Countdown

python开发的简单窗口界面的倒计时界面，python倒计时,# Countdown

# Countdown using Tkinter from Tkinter import *import timeimport tkMessageBoxclass 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()