Roger Serwy <roger.serwy at gmail.com> added the comment: I tried your tk_hello.py code and it works on Python 3. The code for creating the QUIT button exceeds 80 columns. I'd insert a \n after the second argument: self.QUIT = tk.Button(self, text = "QUIT", fg = "red", command = root.destroy) ---------- _______________________________________ Python tracker <report at bugs.python.org> <http://bugs.python.org/issue14163> _______________________________________