PyGame, window is not closing, tut not helping

[globalrev]

im doing this :
http://www.learningpython.com/2006/03/12/creating-a-game-in-python-using-pygame-part-one/

and when closing the program the window stays up and doesnt respond. i
tried adding this:
http://www.pygame.org/wiki/FrequentlyAskedQuestions

bu it doesnt work, or maybe im doing it wrong.

heres the code without the added tutorial exit:


import os, sys
import pygame
from pygame.locals import *

if not pygame.font: print 'Warning, fonts disabled'
if not pygame.mixer: print 'Warning, sound disabled'

class PyManMain:
    """The Main PyMan Class - This class handles the main
    initialization and creating of the Game."""

    def __init__(self, width=640,height=480):
        """Initialize"""
        """Initialize PyGame"""
        pygame.init()
        """Set the window Size"""
        self.width = width
        self.height = height
        """Create the Screen"""
        self.screen = pygame.display.set_mode((self.width
                                               , self.height))


    def MainLoop(self):
        """This is the Main Loop of the Game"""
        while 1:
            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    sys.exit()


class Snake(pygame.sprite.Sprite):
    """This is our snake that will move around the screen"""

    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image, self.rect = load_image('snake.png',-1)
        self.pellets = 0

if __name__ == "__main__":
    MainWindow = PyManMain()
    MainWindow.MainLoop()