Pygame error: display surface quit: Why?

Question

Can anyone tell me why my app quits with:

pygame error: display Surface quit.

Answer 1

import pygame, sys

running = True
while running:
    for event in pygame.event.get():
    if event.type == pygame.QUIT:
        pygame.quit() # quit the screen
        running = False
        sys.exit()

call sys.exit() after pygame.quit() to stop the program so you can not change the surface after you have quit pygame and not get the error