我在stackoverflow（'How to create bullets in pygame?'）中发现了另一篇关于如何添加项目符号的帖子，但是，它们无法正常工作，程序抱怨以下错误“语法无效”我可能做错了什么？请帮我！这是代码：
import pygame, random, sys
from pygame.locals import *
TEXTCOLOR = (0, 0, 0)
FPS = 60
BADDIEMINSIZE = 8
BADDIEMAXSIZE = 70
BADDIEMINSPEED = 1
BADDIEMAXSPEED = 12
ADDNEWBADDIERATE = 1
PLAYERMOVERATE = 3
WINDOWWIDTH = 1280
WINDOWHEIGHT = 780
screen = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
background = pygame.image.load("background.png")
backgroundRect = background.get_rect
background_position = [0, 0]
bulletpicture = pygame.image.load("bullet.png")
bullets = []
def terminate():
pygame.quit()
sys.exit()
def waitForPlayerToPressKey():
while True:
for event in pygame.event.get():
if event.type == QUIT:
terminate()
if event.type == KEYDOWN:
if event.key == K_ESCAPE: # pressing escape quits
terminate()
return
def playerHasHitBaddie(playerRect, baddies):
for b in baddies:
if playerRect.colliderect(b['rect']):
return True
return False
def drawText(text, font, surface, x, y):
textobj = font.render(text, 1, TEXTCOLOR)
textrect = textobj.get_rect()
textrect.topleft = (x, y)
surface.blit(textobj, textrect)
# set up pygame, the window, and the mouse cursor
pygame.init()
mainClock = pygame.time.Clock()
windowSurface = pygame.display.set_mode((WINDOWWIDTH, WINDOWHEIGHT))
pygame.display.set_caption('Dodger')
pygame.mouse.set_visible(False)
# set up fonts
font = pygame.font.SysFont(None, 48)
# set up sounds
gameOverSound = pygame.mixer.Sound('gameover.wav')
click_sound = pygame.mixer.Sound("pistol.wav")
# set up images
playerImage = pygame.image.load('ship.png')
playerRect = playerImage.get_rect()
baddieImage = pygame.image.load('baddie.png')
background_image = pygame.image.load("background.png") .convert()
# Copy image to screen
screen.blit(background_image, background_position)
# Set positions of graphics
background_position = [0, 0]
# show the "Start" screen
drawText('Dodger', font, windowSurface, (WINDOWWIDTH / 3), (WINDOWHEIGHT / 3))
drawText('Press a key to start.', font, windowSurface, (WINDOWWIDTH / 3) - 30, (WINDOWHEIGHT / 3) + 50)
pygame.display.update()
waitForPlayerToPressKey()
topScore = 0
while True:
# set up the start of the game
baddies = []
score = 0
playerRect.topleft = (WINDOWWIDTH / 2, WINDOWHEIGHT - 50)
moveLeft = moveRight = moveUp = moveDown = False
reverseCheat = slowCheat = False
baddieAddCounter = 0
while True: # the game loop runs while the game part is playing
score += 1 # increase score
for event in pygame.event.get():
if event.type == QUIT:
terminate()
if event.type == KEYDOWN:
if event.key == ord('z'):
reverseCheat = True
if event.key == ord('x'):
slowCheat = True
if event.key == K_LEFT or event.key == ord('a'):
moveRight = False
moveLeft = True
if event.key == K_RIGHT or event.key == ord('d'):
moveLeft = False
moveRight = True
if event.key == K_UP or event.key == ord('w'):
moveDown = False
moveUp = True
if event.key == K_DOWN or event.key == ord('s'):
moveUp = False
moveDown = True
if event.type == KEYUP:
if event.key == ord('z'):
reverseCheat = False
score = 0
if event.key == ord('x'):
slowCheat = False
score = 0
if event.key == K_ESCAPE:
terminate()
if event.key == K_LEFT or event.key == ord('a'):
moveLeft = False
if event.key == K_RIGHT or event.key == ord('d'):
moveRight = False
if event.key == K_UP or event.key == ord('w'):
moveUp = False
if event.key == K_DOWN or event.key == ord('s'):
moveDown = False
if event.key == ord('p'):
click_sound.play()
bullets.append([event.pos[0]-32, 500])
if event.type == MOUSEMOTION:
# If the mouse moves, move the player where the cursor is.
playerRect.move_ip(event.pos[0] - playerRect.centerx, event.pos[1] - playerRect.centery)
# Add new baddies at the top of the screen, if needed.
if not reverseCheat and not slowCheat:
baddieAddCounter += 1
if baddieAddCounter == ADDNEWBADDIERATE:
baddieAddCounter = 0
baddieSize = random.randint(BADDIEMINSIZE, BADDIEMAXSIZE)
newBaddie = {'rect': pygame.Rect(random.randint(0, WINDOWWIDTH-baddieSize), 0 - baddieSize, baddieSize, baddieSize),
'speed': random.randint(BADDIEMINSPEED, BADDIEMAXSPEED),
'surface':pygame.transform.scale(baddieImage, (baddieSize, baddieSize)),
}
baddies.append(newBaddie)
# Move the player around.
if moveLeft and playerRect.left > 0:
playerRect.move_ip(-1 * PLAYERMOVERATE, 0)
if moveRight and playerRect.right < WINDOWWIDTH:
playerRect.move_ip(PLAYERMOVERATE, 0)
if moveUp and playerRect.top > 0:
playerRect.move_ip(0, -1 * PLAYERMOVERATE)
if moveDown and playerRect.bottom < WINDOWHEIGHT:
playerRect.move_ip(0, PLAYERMOVERATE)
# Move the mouse cursor to match the player.
pygame.mouse.set_pos(playerRect.centerx, playerRect.centery)
for b in range(len(bullets)):
bullets.remove(bullet)
# Move the baddies down.
for b in baddies:
if not reverseCheat and not slowCheat:
b['rect'].move_ip(0, b['speed'])
elif reverseCheat:
b['rect'].move_ip(0, -5)
elif slowCheat:
b['rect'].move_ip(0, 1)
# Delete baddies that have fallen past the bottom.
for b in baddies[:]:
if b['rect'].top > WINDOWHEIGHT:
baddies.remove(b)
# Draw the game world on the window.
for bullet in bullets:
if bullet[0]<0:
bullets.remove(bullet)
screen.blit(background_image, background_position)
for bullet in bullets:
screen.blit(bulletpicture, pygame.Rect(bullet[0], bullet[1], 0, 0,)
# Draw the score and top score.
drawText('Score: %s' % (score), font, windowSurface, 10, 0)
drawText('Top Score: %s' % (topScore), font, windowSurface, 10, 40)
# Draw the player's rectangle
windowSurface.blit(playerImage, playerRect)
# Draw each baddie
for b in baddies:
windowSurface.blit(b['surface'], b['rect'])
pygame.display.update()
# Check if any of the baddies have hit the player.
if playerHasHitBaddie(playerRect, baddies):
if score > topScore:
topScore = score # set new top score
break
mainClock.tick(FPS)
# Stop the game and show the "Game Over" screen.
gameOverSound.play()
drawText('You lose', font, windowSurface, (WINDOWWIDTH / 3), (WINDOWHEIGHT / 3))
drawText('Press a key to play again.', font, windowSurface, (WINDOWWIDTH / 3) - 80, (WINDOWHEIGHT / 3) + 50)
pygame.display.update()
waitForPlayerToPressKey()
gameOverSound.stop()
我是python的初学者，我几乎完成了我的游戏。
答案 0 :(得分：1)
screen.blit(bulletpicture, pygame.Rect(bullet[0], bullet[1], 0, 0)
更改此行，您忘记关闭)
screen.blit(bulletpicture, pygame.Rect(bullet[0], bullet[1], 0, 0))