擅长:python、mysql、java
<p>将代码改为如下所示:</p>
<pre><code>def main():
screen = pygame.display.set_mode((675, 480))
pygame.display.set_caption("Space Invaders")
background = pygame.Surface(screen.get_size())
background.fill((0, 0, 0))
allSprites = pygame.sprite.Group()
for j in range(0, 5):
for i in range(0, 10):
invader1 = Invader1(screen, (75*i,75*j ))
invader1.add(allSprites)
</code></pre>