title: Copying to clipboard from Python 3.4 in Windows 10 using tkinter causes crashes when trying to paste
body: <p>I've tried a number of different things and searched for the topic here, but I can't find a solution to this.  The code runs fine, but when I try to paste what it's copied to the clipboard, the program I'm pasting into stops responding.  As soon as I close my Python application, the programs start to respond again, but the clipboard is empty.  This is for a school assignment and it requires me to use only tools that come with the Python installation, so no Pyperclip or the like.  </p>
  
  <p>Here's the code I'm working from:</p>
  
  <pre><code>from tkinter import Tk
  r = Tk()
  r.withdraw()
  r.clipboard_clear()
  r.clipboard_append('This is a test to try to copy to clipboard')
  r.update()
  r.destroy()
  </code></pre>