"pygame.error: système vidéo non initialisé" après avoir appelé "pygame.event.get()"

Question

Lorsque j'essaie de charger mon jeu, tout fonctionne sauf le fait qu'il plante et python ne répond pas. Je ne peux pas voir ce que j'ai manqué.

Voici le code complet:

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import pygame 
import random 
from os import path 

img_dir = path.join(path.dirname(__file__), 'Sprites') 
snd_dir = path.join(path.dirname(__file__), 'sound') 

WIDTH = 480 
HEIGHT = 600 
FPS = 60 

car_img = pygame.image.load(path.join(img_dir, "copgreen20.bmp")) 
mob_img = pygame.image.load(path.join(img_dir, "mob_zom.bmp")) 
priv_img = pygame.image.load(path.join(img_dir, "copgreen20.bmp")) 
# define colors 
WHITE = (255, 255, 255) 
BLACK = (0, 0, 0) 
RED = (255, 0, 0) 
GREEN = (0, 255, 0) 
BLUE = (0, 0, 255) 
YELLOW = (255, 255, 0) 

# initialize pygame and create window 
pygame.init() 
pygame.display.init() 
screen = pygame.display.set_mode([800, 600]) 
test = "space.ogg" 

pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=4096) 
pygame.mixer.music.load(path.join(snd_dir, 'atari.ogg')) 
pygame.mixer.music.play(-1)  
screen = pygame.display.set_mode((WIDTH, HEIGHT)) 
pygame.display.set_caption("My Game") 
clock = pygame.time.Clock() 
clock.tick(FPS) 
font_name = pygame.font.match_font('Arial') 
def draw_text(surf, text, size, x, y): 
    font = pygame.font.Font(font_name, size) 
    text_surface = font.render(text, True, BLUE) 
    text_rect = text_surface.get_rect() 
    text_rect.midtop = (y, x) 
    surf.blit(text_surface, text_rect) 

font_name = pygame.font.match_font('Arial') 
def draw_text(surf, text, size, x, y): 
    font = pygame.font.Font(font_name, size) 
    text_surface = font.render(text, True, YELLOW) 
    text_rect = text_surface.get_rect() 
    text_rect.midtop = (x, y) 
    surf.blit(text_surface, text_rect) 
class Player(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = pygame.Surface((80, 50)) 
     self.images = [] 
     self.image = car_img 
     self.rect = self.image.get_rect() 
     self.rect.centerx = WIDTH/2 
     self.rect.bottom = HEIGHT - 50 
     self.speedx = 0 
     self.image = pygame.transform.scale(car_img, (50, 80)) 
     self.image.set_colorkey(GREEN) 
    def update(self): 
     self.speedx = 0 
     keystate = pygame.key.get_pressed() 
     if keystate[pygame.K_LEFT]: 
      self.speedx = -8 
     if keystate[pygame.K_RIGHT]: 
      self.speedx = 8 
     if keystate[pygame.K_UP]: 
      self.speedy = -8 
     self.rect.x += self.speedx 
     if self.rect.right > WIDTH: 
      self.rect.right = WIDTH 
     if self.rect.left < 0: 
      self.rect.left = 0 

    def shoot(self): 
     bullet = Bullet(self.rect.centerx, self.rect.top) 
     all_sprites.add(bullet) 
     bullets.add(bullet) 

class Mob(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = pygame.Surface((30, 40)) 
     self.image = mob_img 
     self.rect = self.image.get_rect() 
     self.rect.x = random.randrange(WIDTH - self.rect.width) 
     self.rect.y = random.randrange(-100, -40) 
     self.speedy = random.randrange(1, 9) 
     self.speedx = random.randrange(-3, 3) 
     self.image.set_colorkey(WHITE) 
     self.image.set_colorkey(YELLOW) 
    def update(self): 
     self.rect.x += self.speedx 
     self.rect.y += self.speedy 
     if self.rect.top > HEIGHT + 10 or self.rect.left < -25 or self.rect.right > WIDTH + 20: 
      self.rect.x = random.randrange(WIDTH - self.rect.width) 
      self.rect.y = random.randrange( -100, -40) 
      self.speedy = random.randrange(1, 8) 

class Priv(pygame.sprite.Sprite): 
    def __init__(self): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = pygame.Surface((30, 40)) 
     self.image = priv_img 
     self.rect = self.image.get_rect() 
     self.rect.x = random.randrange(WIDTH - self.rect.width) 
     self.rect.y = random.randrange(-100, -40) 
     self.speedy = random.randrange(1, 9) 
     self.speedx = random.randrange(-3, 3) 
     self.image.set_colorkey(WHITE) 
     self.image.set_colorkey(YELLOW) 
    def update(self): 
     self.rect.x += self.speedx 
     self.rect.y += self.speedy 
     if self.rect.top > HEIGHT + 10 or self.rect.left < -25 or self.rect.right > WIDTH + 20: 
      self.rect.x = random.randrange(WIDTH - self.rect.width) 
      self.rect.y = random.randrange( -100, -40) 
      self.speedy = random.randrange(1, 8) 

class Bullet(pygame.sprite.Sprite): 
    def __init__(self, x, y): 
     pygame.sprite.Sprite.__init__(self) 
     self.image = pygame.Surface((10, 20)) 
     self.image.fill(YELLOW) 
     self.rect = self.image.get_rect() 
     self.rect.bottom = y 
     self.rect.centerx = x 
     self.speedy = 200 

def show_go_screen(): 
    screen.blit(background, background_rect) 
    draw_text(screen, "SHMUP!", 64, WIDTH/2, HEIGHT/4) 
    draw_text(screen, "Arrow keys move, Space to fire", 22, 
       WIDTH/2, HEIGHT/2) 
    draw_text(screen, "Press a key to begin", 18, WIDTH/2, HEIGHT * 3/4) 
    pygame.display.flip() 
    waiting = True 
    while waiting: 
     clock.tick(FPS) 
     for event in pygame.event.get(): 
      if event.type == pygame.QUIT: 
       pygame.quit() 
      if event.type == pygame.K_SPACE: 
       waiting = False 

all_sprites = pygame.sprite.Group() 
mobs = pygame.sprite.Group() 
player = Player() 
all_sprites.add(player) 

background = pygame.image.load(path.join(img_dir, "back_road_update.bmp")).convert() 
background_rect = background.get_rect() 
bullets = pygame.sprite.Group() 
allspriteslist = pygame.sprite.Group() 

#showstartscreen() 

for i in range(8): 
    m = Mob() 
    all_sprites.add(m) 
    mobs.add(m) 

#def game_intro(): 
    #display = pygame.display.set_mode((800,600)) 
    #intro = True 
    #while intro: 
     #for event in pygame.event.get(): 
      #if event.type == pygame.QUIT: 
       #pygame.quit() 
       #quit() 

     #display.fill(BLACK) 
     #largeText = pygame.font.match_font('Arial',10) 
     #textSurf, textRect = draw_text(text, size, x, y) 
     #textRect.centre = ((display_width/2), (display_height/2)) 
     #display.blit(textSurf, textRect) 
     #pygame.display.update() 
     #clock.tick(15) 
    #pygame.display.update() 
show_go_screen() 
score = 000 
score2 = 50 
# Game loop 
#game_intro() 
game_over = True 
running = True 
while running: 
    if game_over: 
     game_over = False 
running = True 
while running: 
    # keep loop running at the right speed 
    clock.tick(FPS) 
    # Process input (events) 
    for event in pygame.event.get(): 
     # check for closing window 
     if event.type == pygame.QUIT: 
      running = False 
      #for i in range(5): 
        #m = Mob() 
        #all_sprites.add(m) 
        #mobs.add(m) 
     elif event.type == pygame.KEYDOWN: 
      if score2 == 0: 
       game_over = True 
      if event.type == pygame.K_9: 
       running = False 
      if event.key == pygame.K_SPACE: 
       player.shoot() 
       score2 -= 1 
      if event.key == pygame.K_EQUALS: 
       for i in range(100): 
        m = Mob() 
        all_sprites.add(m) 
        mobs.add(m) 
      #if event.key == pygame.K_SPACE: 
      if clock.tick == 10: 
       for i in range(100): 
        m = Mob() 
        all_sprites.add(m) 
        mobs.add(m) 
      if event.key == pygame.K_1: 
       for i in range(2): 
        p = Priv() 
        all_sprites.add(p) 
        Priv.add(p) 
      if event.key == pygame.K_2: 
       for i in range(10): 
        m = Mob() 
        all_sprites.add(m) 
        mobs.add(m) 
    # Update 
    all_sprites.update() 

    hits = pygame.sprite.groupcollide(mobs, bullets, True, True) 
    for hit in hits: 
      score += 1 
      m = Mob() 
      all_sprites.add(m) 
      mobs.add(m) 
      p = Priv() 
      all_sprites.add(m) 
      Priv.add(p) 

    hits = pygame.sprite.spritecollide(player, mobs, False) 
    #if hits: 
     #running = False 

    try: 
     for i in bullets: 
      i.rect.bottom += -5 
    except: 
     None 
     # Draw/render 
    screen.fill(BLACK) 
    screen.blit(background, background_rect) 
    draw_text(screen, str(score), 50, WIDTH/10, 10) 
    draw_text(screen, str(score2), 50, HEIGHT/13, 200) 
    #draw_text(screen, str(scores), 50, WIDTH/10, 10) 
    all_sprites.draw(screen) 
# *after* drawing everything, flip the display 
    pygame.display.flip() 
pygame.QUIT 

Voici l'erreur que cela arrive si je force quitter l'application:

Traceback (most recent call last): 

File "/Users/harrisonj11/NetBeansProjects/game_test_jakob/src/game_test_jakob.py", line 187, in <module> 
    show_go_screen() 

File "/Users/harrisonj11/NetBeansProjects/game_test_jakob/src/game_test_jakob.py", line 147, in show_go_screen 
    for event in pygame.event.get(): 
pygame.error: video system not initialized 

Answer 1

pygame.quit ne quitte pas l'ensemble du programme, il uninitializes juste la modules de pygame. Donc, la boucle while dans show_go_screen est toujours en cours d'exécution et appelle pygame.event.get(), mais cela ne fonctionne plus une fois que vous avez tout initialisé et que pygame.error: video system not initialized est déclenché. Pour quitter le jeu, appelez sys.exit() après pygame.quit(). Ajoutez import sys en haut du fichier.

Aussi, pour lancer le jeu que je devais modifier la boucle d'événement dans show_go_screen et enlever la première boucle while running::

def show_go_screen(): 
    screen.blit(background, background_rect) 
    draw_text(screen, "SHMUP!", 64, WIDTH/2, HEIGHT/4) 
    draw_text(screen, "Arrow keys move, Space to fire", 22, 
       WIDTH/2, HEIGHT/2) 
    draw_text(screen, "Press a key to begin", 18, WIDTH/2, HEIGHT * 3/4) 
    pygame.display.flip() 
    waiting = True 
    while waiting: 
     clock.tick(FPS) 
     for event in pygame.event.get(): 
      if event.type == pygame.QUIT: 
       pygame.quit() 
       sys.exit() 
      # First check if the event type is KEYDOWN. 
      if event.type == pygame.KEYDOWN: 
       # Then you need to check if the `event.key` not `event.type` 
       # equals `pygame.K_SPACE`. 
       if event.key == pygame.K_SPACE: 
        waiting = False