Ein Lüftungsprogramm in Python

vent.pyw

import datetime
import threading
import time
import tkinter
import winsound
window = tkinter.Tk()
exiting = False
def on_closing( event=None ):
    global exiting
    exiting = True
    window.destroy()
window.protocol( "WM_DELETE_WINDOW", on_closing )
bar = tkinter.Menu( window )
menu = tkinter.Menu( bar, tearoff=0 )
menu.add_command( label="Windows have been opened", command=lambda:windows_have_been_opened() )
bar.add_cascade( label="Windows", menu=menu )
window.config( menu=bar )
def timer_function():
    global running
    running = True
    label=tkinter.Label(window )
    label.grid( row=0, column=0 )

    base_time = datetime.datetime.now( datetime.timezone.utc )
    while not exiting:
        current_time = datetime.datetime.now( datetime.timezone.utc )
        dt =( current_time - base_time ).seconds/60
        label['text'] = str(dt)
        if dt > wait_time:
            # if wait_time == 20:
            window.attributes('-fullscreen', True)
            window.lift()
            window.attributes('-topmost', 1)
            window.attributes('-topmost', 0)
            window.focus_force()
            window.bell()
            winsound.Beep( 1000, 100 );winsound.Beep( 1000, 100 );winsound.Beep( 1000, 100 );winsound.Beep( 1000, 100 );winsound.Beep( 1000, 100 )
            # else: winsound.Beep( 440, 500 ); winsound.Beep( 440, 500 ); winsound.Beep( 440, 500 )
            # base_time = datetime.datetime.now( datetime.timezone.utc )
        time.sleep( 1 )
    running = False

def terminate_current_thread():
    global exiting
    global running
    try:
        running
    except NameError:
        running = False
    while running:
        exiting = True
        winsound.Beep( 500, 100 )
        time.sleep( 1 )
    exiting = False
    
def windows_have_been_opened():
    global wait_time
    winsound.Beep( 500, 100 )
    terminate_current_thread()
    assert not running
    assert not exiting
    wait_time = 20
    timer_thread = threading.Thread( target=timer_function )
    timer_thread.start()

tkinter.mainloop()