Question

现在在python中显示的错误是

Traceback (most recent call last):
  File "C:\Users\Eduardo.Graglia\AppData\Local\Programs\Python\Python37\Start.py", line 66, in <module>
    snake = snake(self) # create an instance
  File "C:\Users\Eduardo.Graglia\AppData\Local\Programs\Python\Python37\Start.py", line 17, in __init__
    food.image = pygame.image.load("food.png")
AttributeError: 'str' object has no attribute 'image'

我是python和pygame的新手，所以我一直在使用的大多数代码都是我从堆栈溢出中获取并改编的内容

我尝试对food对象进行处理的原因是将其全部放在一个播放器类中，因为我对如何调用其他类的方法以及如何在一个类中使用其他类的对象感到困惑。如果有人对我所做的事情有其他选择，请告诉我。导入pygame 导入操作系统导入时间导入数学随机导入

length = 650
width = 400
headx = 0
heady = 0
class snake(object):

    def __init__(self, food):        
        self.image = pygame.image.load("head.png")
        self.x = 0
        self.y = 0
        food.image = pygame.image.load("food.png")
        food.x = 0
        food.y = 0
    def handle_keys(self):
        """ Handles Keys """
        key = pygame.key.get_pressed()
        dist = 25 # distance moved in 1 frame, try changing it to 5

        if key[pygame.K_DOWN]: # down key
            self.y += dist # move down
            heady = heady - dist
        elif key[pygame.K_UP]: # up key
            self.y -= dist # move up
            heady = heady - dist
        if key[pygame.K_RIGHT]: # right key
            self.x += dist # move right
            headx = headx - dist
        elif key[pygame.K_LEFT]: # left key
            self.x -= dist # move left
            headx = headx - dist
    def fooddrop(food, surface):
        newfoodx = 1
        newfoody = 1
        while newfoodx % 25 != 0 or newfoodx !=0:
            newfoodx = random.randint(0,650)
        while newfoody % 25 != 0 or newfoody !=0:
            newfoody = random.randint(0,400)
        food.x = newfoodx
        food.y = newfoody
        surface.blit(food.image,(food.x,food.y))
    def draw(self, surface):
        """ Draw on surface """
        # blit yourself at your current position
        surface.blit(self.image, (self.x, self.y))










self = 'null'
food = 'null'
pygame.init()
screen = pygame.display.set_mode((length, width))

snake = snake(self) # create an instance
food = snake(food)

running = True
while running:
    # handle every event since the last frame.
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit() # quit the screen
            running = False
    if snake.y > width or snake.y < 0 or snake.x > length or snake.x < 0: #Border Created
        pygame.quit() # quit the screen
        running = False
    time.sleep(0.125)
    snake.handle_keys() # handle the keys
    screen.fill((0,0,0)) # fill the screen with white
    snake.draw(screen) # draw the snake to the screen   
    snake.fooddrop(screen)
    pygame.display.update() # update the screen

    clock.tick(40)

由于我是新手并且需要学习，请随意完全破坏我的代码。预先感谢！

Answer 1

您必须区分Classes和类实例（objects）。

创建一个类Snake（或其他名称）。请使用班级名称开头的大写字母以避免混淆（请参阅Style Guide for Python Code - Class Names）。
该类的构造函数具有1个参数（在self旁边），即图像的名称：

class Snake(object):

    def __init__(self, imagename):        
        self.image = pygame.image.load(imagename)
        self.x = 0
        self.y = 0

创建该类的2个实例：

snake = Snake("head.png")
food = Snake("food.png")

我在pygame中制作蛇，而python给我一个错误，我的对象之一实际上是一个字符串，但是它并不意味着

1 个答案: