title: Join Threads running inside Tkinter.Tk().mainloop
body: <p>I am working with tkinter and within the <code>__init__()</code> method of my <code>Windows</code> class, where I launch two threads that execute a method.</p>
  
  <p>My problem is that I can't figure out where to call <code>.join()</code> so that those threads don't continue their execution once the main window is destroyed through <code>Tk().destroy()</code> method.</p>