#!/usr/bin/env python#coding=utf-8from Tkinter import *import timeimport randomclass App:  def __init__(self,master):    frame = Frame(master)    frame.pack()    v = StringVar()    self.e = Entry(frame,textvariable=v,bd='5')    v.set('')    self.v = v    self.e.pack(padx=5)    self.button1 = Button(frame,text = 'start',fg='red',command=self.start_hi)    self.button1.pack(side=LEFT)    self.button2 = Button(frame,text='stop',fg = 'blue',command=self.say_stop)    self.button2.pack(side=LEFT)    self.root=master    self.stop = 0    #scrollbar = Scrollbar(frame, orient=VERTICAL)    #self.b1 = Listbox(frame, yscrollcommand=scrollbar.set)    #scrollbar.pack(side=RIGHT, fill=Y)    #self.b1.pack(side=LEFT, fill=BOTH, expand=1)  def list_star(self):    star = []    file = open('yaojiang.txt','r+')    data = file.readlines()    file.close()    for n in data:      l1 = n.split(':')      a = l1[0] + ':'+ l1[1][:4] + 'xxxx' + l1[1][8:12]      a = a.strip()      star.append(a)    return star  def start_hi(self):    self.stop = 0     #star = []    #file = open('yaojiang.txt','r+')    #data = file.readlines()    #file.close()    #for n in data:      #l1 = n.split(':')      #a = l1[0] + ':'+ l1[1][:4] + 'xxxx' + l1[1][8:12]      #a = a.strip()      #star.append(a)    star = self.list_star()    self.update_clock(star)  def say_stop(self):    self.stop = 1    #b = self.start()  def update_clock(self,star):    b = random.choice(star)    self.v.set(b)    if self.stop == 1:      return      self.root.after(50, self.update_clock,star)root = Tk()app = App(root)root.mainloop()