類型錯誤：__init__() 缺少 2 個必需的位置參數：子彈射擊系統的“x”和“y”

Question

當我運行這段代碼時，它說我有一個錯誤：

TypeError: __init__() missing 2 required positional arguments: 'x' and 'y'

我打電話給班級並將他們添加到一個組中：

kunai = Kunai()
kunai_sprites = pg.sprite.Group() #puts all the kunai sprites into a group

這是課程：

#throwing projectile (kunai)
class Kunai(pg.sprite.Sprite): #creating the kunai class
    def __init__(self, x, y): #initialising the kunai
        pg.sprite.Sprite.__init__(self)
        self.image = pg.Surface((10,20))
        self.image.fill(RED)
        self.velocity = 35
        self.rect = self.image.get_rect()
        self.rect.bottom = y
        self.rect.centrex = x

#drawing a circle which will determine the throwing range of the kunai
    def update(self):
        self.rect.y = self.rect.y + self.velocity #the kunai moves at set speed
        if self.rect.bottom < 0: #if the sprite crosses 
            self.kill() #it removes the sprite

Answer 1

你需要做。

kunai = Kunai(x,y)

就像錯誤所說的那樣，您在初始化中缺少兩個參數。