我正在尝试使用TheNewBoston的教程制作一个蛇游戏,因为我是一名中学生,并且没有太多的python经验。代码是:
__author__ = 'Ded'
import pygame
import time
pygame.init()
display_width = 800
display_height = 600
gameDisplay = pygame.display.set_mode((display_width, display_height))
pygame.display.set_caption('Dipshit')
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
green = (0, 255, 0)
blue = (0, 0, 255)
clock = pygame.time.Clock()
block_size = 10
FPS = 30
font = pygame.font.SysFont(None, 25)
def message_to_screen(msg,color):
screen_text = font.render(msg, True, color)
gameDisplay.blit(screen_text, [display_width/2, display_height/2])
def gameLoop():
gameExit = False
gameOver = False
lead_x = display_width/2
lead_y = display_height/2
lead_x_change = 0
lead_y_change = 0
while not gameExit:
while gameOver == True:
gameDisplay.fill(white)
message_to_screen("Game over, press C to play again or Q to quit", red)
pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_q:
gameExit = True
gameOver = False
if event.key == pygame.K_c:
gameLoop()
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
lead_x_change -= block_size
lead_y_change = 0
if event.key == pygame.K_RIGHT:
lead_x_change += block_size
lead_y_change = 0
if event.key == pygame.K_DOWN:
lead_y_change += block_size
lead_x_change = 0
if event.key == pygame.K_UP:
lead_y_change -= block_size
lead_x_change = 0
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
lead_x_change = 0
if event.type == pygame.KEYUP:
if event.key == pygame.K_DOWN or event.key == pygame.K_UP:
lead_y_change = 0
if lead_x >= display_width or lead_x < 0 or lead_y >= display_height or lead_y < 0:
gameOver = True
lead_x += lead_x_change
lead_y += lead_y_change
gameDisplay.fill(white)
pygame.draw.rect(gameDisplay, black, [lead_x,lead_y,block_size,block_size])
pygame.display.update()
clock.tick(FPS)
pygame.quit()
quit()
gameLoop()
但是,当我执行,播放,丢失并按C重试时,我收到此错误。当我想退出但是C退出时,Q工作正常,并打印出这个错误:
C:\ Python34 \ python.exe&#34; C:/ Users / Ded / PycharmProjects / PyGame / PyGame Tutorial.py&#34; Traceback(最近一次调用最后一次):文件 &#34; C:/ Users / Ded / PycharmProjects / PyGame / PyGame Tutorial.py&#34;,第100行,in gameLoop()文件&#34; C:/ Users / Ded / PycharmProjects / PyGame / PyGame Tutorial.py&#34;,第56行,在gameLoop中 gameLoop()文件&#34; C:/ Users / Ded / PycharmProjects / PyGame / PyGame Tutorial.py&#34;,第76行,在gameLoop中 if event.type == pygame.KEYUP:UnboundLocalError:local variable&#39; event&#39;在分配前引用
使用退出代码1完成处理
答案 0 :(得分:0)
您需要缩进代码的这些部分:
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
lead_x_change = 0
if event.type == pygame.KEYUP:
if event.key == pygame.K_DOWN or event.key == pygame.K_UP:
lead_y_change = 0
这样它们就是for
循环的一部分。否则,如果没有要获取的事件且没有发生循环迭代,则不会定义变量event
。