问在崇高文本3中运行游戏时分割故障11

EN

import pygame, sys 
from pygame.locals import * 

pygame.init() 

#set up the window
DISPLAYSURF = pygame.display.set_mode((400, 300)) 
pygame.display.set_caption('Drawing') 

# set up the colors 
BLACK = ( 0, 0, 0) 
WHITE = (255, 255, 255) 
RED = (255, 0, 0) 
GREEN = ( 0, 255, 0) 
BLUE = ( 0, 0, 255)

# Draw on surface object
DISPLAYSURF.fill(WHITE)
pygame.draw.polygon(DISPLAYSURF, GREEN, ((146, 0), (291, 106), (236, 277), (56, 277), (0,        106))) 
pygame.draw.line(DISPLAYSURF, BLUE, (60, 60), (120, 60), 4) 
pygame.draw.line(DISPLAYSURF, BLUE, (120, 60), (60, 120)) 
pygame.draw.line(DISPLAYSURF, BLUE, (60, 120), (120, 120), 4) 
pygame.draw.circle(DISPLAYSURF, BLUE, (300, 50), 20, 0) 
pygame.draw.ellipse(DISPLAYSURF, RED, (300, 250, 40, 80), 1) 
pygame.draw.rect(DISPLAYSURF, RED, (200, 150, 100, 50)) 


pixObj = pygame.PixelArray(DISPLAYSURF) 
pixObj[480, 380] = BLACK 
pixObj[482, 382] = BLACK 
pixObj[48, 384] = BLACK 
pixObj[486, 386] = BLACK 
pixObj[488, 388] = BLACK 
del pixObj 

while True: # main game loop 
    for event in pygame.event.get(): 
        if event.type == QUIT: 
            sys.exit() 
            pygame.display.update()

Traceback (most recent call last):
  File "sublimePygame", line 29, in <module>
    pixObj[480, 380] = BLACK 
IndexError: invalid index
Segmentation fault: 11