从YouTube教程获取的Python pygame程序仅偶尔正常运行该如何解决

核心故障点 #

• 退出逻辑中pygame.quit未加括号，仅引用了函数对象未实际执行，关闭窗口时pygame相关资源无法正常释放，多次运行后残留进程会占用接口/内存资源，触发程序未响应，首次运行无残留资源时就可以正常执行
• 代码中加载背景图的路径字符串使用了HTML转义字符"，实际运行时需替换为普通双引号
• 可选优化：图片加载后添加convert()/convert_alpha()方法调用，可提升渲染效率，降低偶发卡顿概率

修复后完整代码 #

import pygame
from sys import exit

# crosshair class
class Crosshair(pygame.sprite.Sprite):
    def __init__(self, picture_path):
        super().__init__()
        # 带透明通道的准星图用convert_alpha()
        self.image = pygame.image.load(picture_path).convert_alpha()
        self.rect = self.image.get_rect()
    def update(self):
            self.rect.center = pygame.mouse.get_pos()


# general setup
pygame.init()
clock = pygame.time.Clock()

# create the screen
screen = pygame.display.set_mode((800,400))
pygame.display.set_caption('Runner')
# 替换转义字符为普通双引号，普通背景图用convert()
background = pygame.image.load("sprites/graphics/bg.png").convert()
background = pygame.transform.scale(background, (800, 400))


pygame.mouse.set_visible(False)

#crosshair
crosshair = Crosshair('sprites/graphics/crosshair.png')
crosshair_group = pygame.sprite.Group()
crosshair_group.add(crosshair)


# while loop
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            # 给pygame.quit加括号执行
            pygame.quit()
            exit()


    screen.blit(background,(0,0))
    crosshair_group.draw(screen)
    crosshair_group.update()
    clock.tick(60)
    pygame.display.update()

内容的提问来源于stack exchange，提问作者greg max