dejar de fumar la superficie de la superficie

import pygame
running = True

while running:
  for event in pygame.event.get_pressed():
    if event.type == pygame.QUTI:
      running = False
      
  if not(running):
    pygame.quit()
    break #you got the error because you didn't completely close pygame so add
    	  #so add break after pygame.quit()
Happy Heron