Python用Tkinter的Frame实现眼睛护士的倒计时黑色屏幕

import Tkinter,time
class MyFrame(Tkinter.Frame):
def __init__(self):
Tkinter.Frame.__init__(self)
self.grid()
self.canvas = Tkinter.Canvas(self, bg='black',width=self.winfo_screenwidth(),height=self.winfo_screenheight())
self.canvas.pack()
self.top = self.winfo_toplevel()

#       self.top.update_idletasks()
self.top.overrideredirect(True)

self.exitButton=Tkinter.Button(self,text='Exit',command=self.doExit)
self.exitButton.pack()
self.Label1=Tkinter.Label(self,text='Hello')
self.Label1.pack()
self.exitButton.config()
#       self.pack(fill='both')
self.trickit(5)
app.mainloop()
def doExit(self):

pather=self.winfo_parent()
pather.quit()
self.quit()
def trickit(self,num):
for j in range(num,0,-1):
self.Label1["text"]=j
self.update()
time.sleep(1)
self.doExit()

import Tkinter,sys,time
class BeBig():
root=Tkinter.Tk()
Label1=Tkinter.Label(root,text=time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())))
def beBig(self):

self.root.minsize(self.root.winfo_screenwidth(), self.root.winfo_screenheight())
#self.root.geometry('300x200-100-100')
self.root.config(bg='black')
self.Label1.pack()
topTitle=self.root.winfo_toplevel()
topTitle.overrideredirect(True)
self.trickit(5)
self.root.mainloop()
def trickit(self,num):
for j in range(num,0,-1):
self.Label1["text"]=j
self.root.update()
time.sleep(1)

self.root.destroy()
beBig=BeBig()
beBig.beBig()