Dictionnary indexing error

[Ander]

Hello, i try to animate a character with 3 frames named "playerf1", 2 and 3, in a "player animation" folder.
I use pygame but that is not at the origin of the problem ^^.

So, i have this error :
self.image2 = self.images[self.current_image]
KeyError: 1

I found that this error occurs when the thing i want to find doesnt exist but right here i dont know why it can not find the images in the dictionnary...
Thanks for your help ^^

class AnimateSprite(pygame.sprite.Sprite):

    def __init__(self, sprite_name):
        super().__init__()
        #load the player
        self.image2 = pygame.image.load(sprite_name + '.png')

        self.current_image = 0
        self.images = animations.get(sprite_name)

    # animate the sprite
    def animate(self):
        self.current_image += 1
        if self.current_image >= len(self.images):
            self.current_image = 0

        self.image2 = self.images[self.current_image]


def load_animation_images(sprite_name):
    images = []

    path = "player animation/" + sprite_name
    for num in range(1, 3):
        image_path = path + str(num) + '.png'
        #pygame.image.load is used to load the image_path
        images.append(pygame.image.load(image_path))

    return images

animations = {
    'player': load_animation_images('playerf')
}