How to fix ValueError: <__main__.projectile object at 0x0000019B405CE128> is not in list

How to fix ValueError: <__main__.projectile object at 0x0000019B405CE128> is not in list

我是 python 的新手,我正在尝试使用 pygame 制作一个简单的 space 入侵者游戏,但每当我尝试弹出其中一个时,我总是收到此错误列表中的项目符号。我已经能够用其他碰撞弹出子弹,但无法让这个碰撞起作用。

def hitbaricade():
    global bullets, barricades, enemybullets
    for bullet in bullets:
        for barricade in barricades:
            if abs(barricade.x + (barricade.width//2) - bullet.x) < barricade.width//2 + 2 and abs(barricade.y + barricade.height//2 - bullet.y) < barricade.height//2 + 2:
                bullets.pop(bullets.index(bullet)) #this one breaks
                barricades.pop(barricades.index(barricade)) #this one works


    for ebullet in enemybullets:
        for barricade in barricades:
            if abs(barricade.x + (barricade.width//2) - ebullet.x) < barricade.width//2 + 5 and abs(barricade.y + barricade.height - ebullet.y) < defender.height:
                enemybullets.pop(enemybullets.index(ebullet)) #this one breaks
                barricades.pop(barricades.index(barricade)) #this one works

这里是设置项目符号列表的位置,在此之前列表被声明为空列表

if keys[pygame.K_SPACE] and bulletDelay > 10 and len(bullets) < 1:
            bullets.append(projectile(defender.x + (defender.width//2), 460, -1, 10))
            bulletDelay = 0

这里是我设置路障列表的地方,之前该列表也被声明为空列表

def baricadeSetup():
    global barricades
    x = 45
    y = 410
    x2 = x
    width = 5
    height = 5
    loop = 0
    for i in range(0,4):
        for i in range(0,30):
            barricades.append(shield(x,y,width,height))
            loop += 1
            x += 5
            if loop >= 10:
                loop = 0
                x = x2
                y += 5
        x2 += 125
        x = x2
        y = 410
        loop = 0

我试图获得一个输出,列表中的项目会弹出,但我会得到错误:ValueError: <main.projectile object at 0x000002D6982A5F28> is not在列表中

完整的错误信息如下: pygame 1.9.6 来自 pygame 社区的问候。 https://www.pygame.org/contribute.html 追溯(最近一次通话): 文件 "E:\Python\Scripts\Projects\Login System\spaceInvaders.py",第 317 行,位于 主要的() 文件 "E:\Python\Scripts\Projects\Login System\spaceInvaders.py",第 298 行,在 main hitbaricade() 文件 "E:\Python\Scripts\Projects\Login System\spaceInvaders.py",第 250 行,在 hitbaricade 中 bullets.pop(bullets.index(bullet)) #这个断了 ValueError:<main.projectile object at 0x0000012B51DFE2E8> is not in list

原因是您一遍又一遍地弹出相同的项目。您应该将其从内部循环中移出。

并且在迭代列表时应避免修改列表。

def hitbaricade():
    global bullets, barricades, enemybullets
    bullets_removed = set()
    barricades_removed = set()
    for bullet in bullets:
        for barricade in barricades:
            if abs(barricade.x + (barricade.width//2) - bullet.x) < barricade.width//2 + 2 and abs(barricade.y + barricade.height//2 - bullet.y) < barricade.height//2 + 2:
                bullets_removed.add(bullet)
                barricades_removed.add(barricade)
    bullets = [bullet for bullet in bullets if bullet not in bullets_removed]
    barricades = [barricade for barricade in barricades if barricade not in barricades_removed]

    ebullets_removed = set()
    barricades_removed = set()
    for ebullet in enemybullets:
        for barricade in barricades:
            if abs(barricade.x + (barricade.width//2) - ebullet.x) < barricade.width//2 + 5 and abs(barricade.y + barricade.height - ebullet.y) < defender.height:
                ebullets_removed(ebullet)
                barricades_removed(barricade)
    enemybullets = [ebullet for ebullet in enemybullets if ebullet not in ebullets_removed]
    barricades = [barricade for barricade in barricades if barricade not in barricades_removed]