206530235/让外星人群里移动2

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import random
class spaceInvader(pygame.sprite.Sprite):
def __init__(self):
self.image = pygame.image.load("spaceInvader.png")
self.x = 200
self.y = 390
self.shots = []
def handle_keys(self):
key = pygame.key.get_pressed()
dist = 5
if key[pygame.K_RIGHT]:
self.x+=dist
elif key[pygame.K_LEFT]:
self.x-=dist
def draw(self, surface):
surface.blit(self.image,(self.x,self.y))
for s in self.shots:
s.draw(screen)
class Alien(pygame.sprite.Sprite):
def __init__(self,x,y,direction,alienType):