tkinter_template.py

#!/usr/bin/env python3
import tkinter as tk
import time
import datetime
import threading
import random
import queue
import enum


class WorkerThread(threading.Thread):
    def __init__(self, msg_queue, is_running):
        super().__init__()
        self.msg_queue = msg_queue
        self.is_running = is_running

    def run(self):
        while True:
            if not self.is_running():
                break;
        
            i = random.randint(1,101)
            print(f'{datetime.datetime.now()}: put into queue {i} (size={self.msg_queue.qsize()})')
            self.msg_queue.put(i)
            
            time.sleep(.5)
        print(str(datetime.datetime.now()) + ': shutting down thread')


class MainFrame(tk.Frame):
    def __init__(self, master, msg_queue):
        super().__init__(master)

        self.msg_queue = msg_queue
        
        self.val1 = tk.StringVar()
        self.val2 = tk.StringVar()
        self.val3 = tk.StringVar()

        self.grid()  
        self.createWidgets()
        self.cycle()

    def createWidgets(self):
        tk.Label(self, textvariable=self.val1).grid()
        tk.Label(self, textvariable=self.val2).grid()
        tk.Label(self, textvariable=self.val3).grid()
        
        tk.Button(self, text='Quit', command=self.quit).grid()
        
    def updateWidgets(self):
        self.val1.set(str(datetime.datetime.now()))
        while not self.msg_queue.empty():
            msg = self.msg_queue.get()
            self.val2.set(str(msg))
        self.val3.set('thats it')

    def cycle(self):
        self.updateWidgets()
        
        self.master.after(200, self.cycle)


class Application:
    def __init__(self):
        self.running = False
        self.is_running = lambda: self.running
        
        self.msg_queue = queue.Queue()
        self.worker_thread = WorkerThread(self.msg_queue, self.is_running)
        self.main_frame = None

    def run(self):
        self.running = True
        self.worker_thread.start()
        
        self.main_frame = MainFrame(None, self.msg_queue)
        self.main_frame.master.title('Application Title')
        self.main_frame.mainloop()
        
        self.running = False
        self.worker_thread.join()


def main():
    app = Application()
    app.run()


if __name__ == '__main__':
    main()