python - Why is a pygame.Surface object not subscriptable inside a class?

Question

So I have a list of images to be indexed inside a class.

Code with error:

imgs = [pygame.image.load("myimg1.png"), pygame.image.load("myimg2.png"), pygame.image.load("myimg3.png")]

class ParentClass:
    def __init__(self, imgs, coordinates):
        self.imgs = imgs
        self.index = 0
        self.activeImg = imgs[self.index]
        self.x, self.y = coordinates

class ChildClass(ParentClass):
    def __init__(self, imgs, coordinates):
        super().__init__(imgs, coordinates)
        #more stuff

child = ChildClass(imgs, (100, 100))

Error:

TypeError: 'pygame.Surface' object is not subscriptable

---

Code without error: (Not what I want)

imgs = [pygame.image.load("myimg1.png"), pygame.image.load("myimg2.png"), pygame.image.load("myimg3.png")]

class ParentClass:
    def __init__(self, imgs, startImg, coordinates):
        self.imgs = imgs
        self.index = 0
        self.activeImg = startImg
        self.x, self.y = coordinates

class ChildClass(ParentClass):
    def __init__(self, imgs, coordinates):
        super().__init__(imgs, imgs[0], coordinates)
        #more stuff

child = ChildClass(imgs, (100, 100))

---

I don't understand why that error comes in my main code. As far as I'm aware, this list of images should be indexed without any errors. Python seems to be thinking I'm indexing through the pygame.Surface object (clearly not what I'm doing). But on the other hand, when I pass it as a parameter, it runs without any errors (which is what I find quite confusing).

Help will be appreciated. Thanks.

Answer 1

等待大神答复