#!/usr/bin/env python  #coding=utf-8     from Tkinter import *  import time  import random     class 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()