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| #!/usr/bin/env python
# -*- coding: utf-8 -*-
import Tkinter as tk
import threading, Queue
import random
import time
def dummy_func(msg_queue):
"""Function to randomly generate a message"""
while True:
x = random.random()
time.sleep(x)
msg_queue.put(x)
class MainApplication(tk.Frame):
def __init__(self, master, *args, **kwargs):
tk.Frame.__init__(self, master, *args, **kwargs)
self.master = master
self.msg = Queue.Queue()
self.periodic_call()
# A label where messages will be displayed
self.label = tk.Label(self, text='')
self.label.pack(padx=2, pady=2)
self.run()
def periodic_call(self):
"""Check every 10 ms if there is something new in self.msg"""
# Update label if necessary
if self.msg.qsize() != 0:
msg = self.msg.get(0)
self.label.config(text=msg)
self.master.after(10, self.periodic_call)
def run(self):
"""Run main application in a thread"""
thread = threading.Thread(target=dummy_func, args=(self.msg,))
thread.start()
if __name__ == '__main__':
root = tk.Tk()
MainApplication(root).pack()
root.mainloop() |
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