我已经建造了一所房子，有很多墙我想添加到我的Sprite组中，但是我不知道如何。这是一个列表，我无法在图像周围绘制矩形。

hit_wall = pygame.sprite.spritecollide(PLAYER,WALL,False)

class inside_house(pygame.sprite.Sprite):
def __init__(self,x,y):
    pygame.sprite.Sprite.__init__(self,WALL)
    self.bg_color = (255,255,255)
    self.x = x
    self.y = y
    self.done = False
    self.load_images()
    self.image = self.image_dic[0]
    self.rect = self.image.get_rect()
    self.rect.x = x
    self.rect.y = y
    self.get_out = 375

def load_images(self):
    self.image_dic = [
        pygame.image.load("first_games/adventure_game/graphics/buildings/wall1.png").convert_alpha(),pygame.image.load("first_games/adventure_game/graphics/buildings/wall2.png").convert_alpha(),pygame.image.load("first_games/adventure_game/graphics/buildings/wall3.png").convert_alpha(),pygame.image.load("first_games/adventure_game/graphics/buildings/wall4.png").convert_alpha(),]