Quit-command not quiting

[K Viltersten]

I entered the code from tkinter.pdf, section 
2 but for reason, the application doesn't 
close as i press the quit-button.

The wondow itself vanishes if i click the 
cross in the upper-right corner but pressing
the quit-button only makes it "pressed". 
Then, the program freezes.

This is the code.

from Tkinter import *
class Demo (Frame):
    def __init__ (self, master = None):
        Frame.__init__ (self, master)
        self.grid ()
        self.doLayout ()
    def doLayout (self):
        self.quitButton = Button ( 
            self, 
            text = "Quit", 
            command = self.quit)
        self.quitButton.grid ()

d = Demo ()
d.master.title ("the coolest demo ever")
d.mainloop ()


--
Regards
Konrad Viltersten
--------------------------------
sleep    - a substitute for coffee for the poor
ambition - lack of sense to be lazy