与pygame太空入侵者斗争

Question

我对python很新，我正在与这个游戏挣扎（太空入侵者） 我从pygame获取代码并下载了成瘾文件。当我运行文件 它给了我一个错误

   Traceback (most recent call last):
 File "C:\Users\ra3ww\Downloads\pygame\pyinvaders.py", line 1, in <module>
  from pyinvaders import *
  File "C:\Users\ra3ww\Downloads\pygame\pyinvaders.py", line 23, in <module>
init()
NameError: name 'init' is not defined

Traceback (most recent call last):
File "C:\Users\ra3ww\Downloads\pygame\pyinvaders.py", line 1, in <module>
from pyinvaders import *
File "C:\Users\ra3ww\Downloads\pygame\pyinvaders.py", line 23, in <module>
init()
NameError: name 'init' is not defined

继承人使用的代码，有人可以帮助我吗

from pygame import *
import random

class Sprite:

    def __init__(self, xpos, ypos, filename):
            self.x = xpos
            self.y = ypos
            self.bitmap = image.load(filename)
            self.bitmap.set_colorkey((0,0,0))
    def set_position(self, xpos, ypos):
            self.x = xpos
            self.y = ypos
    def render(self):
            screen.blit(self.bitmap, (self.x, self.y))

    def Intersect(s1_x, s1_y, s2_x, s2_y):
     if (s1_x > s2_x - 30) and (s1_x < s2_x + 30) and (s1_y > s2_y - 30) and                      (  s1_y < s2_y + 30):
            return 1
    else:
            return 0

  init()
  screen = display.set_mode((640,480))
 key.set_repeat(1, 1)
 display.set_caption('PyInvaders')
 backdrop = image.load('data/backdrop.bmp') 
 enemies = []

 x = 0
 count = 0

for count in range(10):
if count < 10:
    enemies.append(Sprite(50 * x + 50, 50, 'data/baddie.bmp'))
    x += 1
    count += 1
else:
    x = 0
    enemies.append(Sprite(100 * x + 100, 50, 'data/baddie.bmp'))
    x += 1





      hero = Sprite(20, 400, 'data/hero.bmp')
     ourmissile = Sprite(0, 480, 'data/heromissile.bmp')
     enemymissile = Sprite(0, 480, 'data/baddiemissile.bmp')
     gameover = image.load('data/gameover.bmp')



     quit = 0
      enemyspeed = 4
      timer = 0        


   while quit == 0:

    heromid = hero.x + 16
    screen.blit(backdrop, (0, 0))

    for count in range(len(enemies)):
            enemies[count].x += enemyspeed
            enemies[count].render()

    if enemies[len(enemies)-1].x > 590:
            enemyspeed = -3
            for count in range(len(enemies)):
                    enemies[count].y += 5

    if enemies[0].x < 10:
            enemyspeed = 3
            for count in range(len(enemies)):
                    enemies[count].y += 5

    if ourmissile.y < 640 and ourmissile.y > 0:
        ourmissile.render()
        ourmissile.y += -5
        timer  = timer + 1

    if enemymissile.y >= 480 and len(enemies) > 0:
        enemymissile.x = enemies[random.randint(0, len(enemies) - 1)].x + 16
        enemymissile.y = enemies[0].y

    if Intersect(hero.x, hero.y, enemymissile.x, enemymissile.y):
       quit = 1

    for count in range(0, len(enemies)):
        if Intersect(ourmissile.x, ourmissile.y, enemies[count].x, enemies[count].y):
                del enemies[count]
                break

    if len(enemies) == 0:
        quit = 1

    for ourevent in event.get():
            if ourevent.type == QUIT:
                    quit = 1
            if ourevent.type == KEYDOWN:
                    if ourevent.key == K_RIGHT and hero.x < 590:
                            hero.x += 5
                    if ourevent.key == K_LEFT and hero.x > 10:
                            hero.x -= 5
                    if ourevent.key == K_SPACE:
                        if timer < 400:
                            timer = 0
                            ourmissile.x = heromid
                            ourmissile.y = hero.y

    enemymissile.render()
    enemymissile.y += 5

    hero.render()

    display.update()
    time.delay(10)


  while quit == 1:
  screen.blit(gameover,(0,0))
  display.update()
  if ourevent.type == KEYDOWN:
    if ourevent.key == K_SPACE:
         quit == 0