Question

I am learning to use Pygame, and when I use sys.exit(), I run into a problem. Here is the code:

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

pygame.init() 

window = pygame.display.set_mode((468, 60)) 
pygame.display.set_caption('Game') 
screen = pygame.display.get_surface() 

file_name = os.path.join("data","image.bmp")

surface = pygame.image.load(file_name)

screen.blit(surface, (0,0)) 
pygame.display.flip() 

def input(events): 
   for event in events: 
      if event.type == QUIT: 
         sys.exit(0) 
      else: 
         print event 

while True: 
   input(pygame.event.get()) 

It’s really just the code from the pygame tutorial. The problem occurs when I actually try to exit, regardless of what event I try to use to sys.exit().

Traceback (most recent call last):
  File "C:/Python27/Lib/site-packages/pygame/examples/test.py", line 25, in <module>
    input(pygame.event.get())
  File "C:/Python27/Lib/site-packages/pygame/examples/test.py", line 20, in input
    sys.exit(0)
SystemExit: 0

… And then the program doesn’t exit. What am I doing wrong here? Because I did notice that this code was for an antiquated version of Python.

Answer 1

sys.exit just throws an exception (a SystemExit exception). This has two unusual effects:

1. It only exits the current thread in a multithreaded application
2. The exception could have been caught.