Question

我跟着这里的教程...... http://pyvideo.org/video/1718/introduction-to-pygame

我遇到了底部的追溯，似乎无法找出从哪里开始寻找问题......事实证明，幻灯片中的一行代码是＆＃39 ; t包含在+和 - 位中，显示他在每一步添加/删除的内容，因此当它应该被添加时不清楚。我使用Pycharms调试器逐步完成并找出问题就在那一行，现在它被注释掉了。

我很困惑为什么那条线在那里，我似乎无法找到他准备的代码示例，看看我还缺少什么（我没有听到视频中观众的任何投诉）。

这里发生了什么？

import pygame    

class Player(pygame.sprite.Sprite):
    def __init__(self, *groups):
        super(Player, self).__init__(*groups)
        self.image = pygame.image.load('Mugger Space Cadet.jpg')
        self.rect = pygame.rect.Rect((16, 32), self.image.get_size())

    def update(self, dt, game):
        last = self.rect.copy()

        key = pygame.key.get_pressed()
        if key[pygame.K_LEFT]:
            self.rect.x -= 150 * dt
        if key[pygame.K_RIGHT]:
            self.rect.x += 150 * dt
        if key[pygame.K_UP]:
            self.rect.y -= 150 * dt
        if key[pygame.K_DOWN]:
            self.rect.y += 150 * dt

        for cell in pygame.sprite.spritecollide(self, game.walls, False):
            self.rect = last

class Game(object):
    def main(self, screen):

        clock = pygame.time.Clock()

        background = pygame.image.load('mockup level.png')
        sprites = pygame.sprite.Group()
#       sprites.add(background)
        self.player = Player(sprites)
        self.walls = pygame.sprite.Group()
        block = pygame.image.load('block.png')
        for x in range(0, 448, 32):
            for y in range(0, 320, 32):
                if x in (0, 448-32) or y in (0, 320-32):
                    wall = pygame.sprite.Sprite(self.walls)
                    wall.image = block
                    wall.rect= pygame.rect.Rect((x, y), block.get_size())
        sprites.add(self.walls)

        while True:
            dt = clock.tick(30)

            for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    return
                if event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
                    return

            sprites.update(dt / 1000., self)
            screen.blit(background, (0, 0))
            sprites.draw(screen)
            pygame.display.flip()


if __name__ == '__main__':
    pygame.init()
    screen = pygame.display.set_mode((448, 320))
    Game().main(screen)

追溯......

Traceback (most recent call last):
  File "C:\Python32\lib\site-packages\pygame\sprite.py", line 365, in add
self.add(*sprite)
TypeError: add() argument after * must be a sequence, not pygame.Surface

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/Jacob/PycharmProjects/PygamePractice/main.py", line 92, in <module>
    Game().main(screen)
  File "C:/Users/Jacob/PycharmProjects/PygamePractice/main.py", line 62, in main
    sprites.add(background)
  File "C:\Python32\lib\site-packages\pygame\sprite.py", line 378, in add
    sprite.add_internal(self)
AttributeError: 'pygame.Surface' object has no attribute 'add_internal'

Answer 1

似乎你试图在函数调用中使用带有Pygame.sprite.Sprite对象的*运算符，但是你只能将它用于可迭代对象（list，tuple）。
E.g：

# define a list or tuple of arguments:
arguments = ["foo", "bar"] # or ("foo", "bar)
# The * operator will pass every item of it as own argument:
my_function(*arguments)

但你不能写

# initialize a non-iterable class:
arguments = object()
# The * operator can't split an object into multiple arguments, so an error is raised
my_function(*arguments)

Pygame help - TypeError：*之后的add（）参数必须是序列，而不是pygame.Surface

1 个答案: