Question

我一直在遵循here的教程来构建一个小型python游戏。这就是其背后的代码：

RUN apt-get update && apt-get install --no-install-recommends -y \
    wget \
    nano \
    git \
    unzip \
    iputils-ping \
    gnupg \
    supervisor \
    cron

COPY .docker/scripts/init-services.sh /usr/bin/init-services

RUN chmod +x /usr/bin/init-services

CMD ["/usr/bin/init-services"]

当我尝试运行它时，窗口打开并立即关闭。但是，如果我删除两个import pygame pygame.init() display_width = 1280 display_height = 720 gameDisplay = pygame.display.set_mode((display_width,display_height)) pygame.display.set_caption("Racing Game") clock = pygame.time.Clock() black = (0,0,0) white = (255,255,255) carImg = pygame.image.load("racecar.png") def car(x,y): gameDisplay.blit(carImg, (x,y)) x = display_width * 0.45 y = display_height * 0.8 x_change = 0 car_speed = 0 crashed = True while crashed: for event in pygame.event.get(): if event.type == pygame.QUIT: crashed = False ## <code to remove> if event.type == pygame.KEYDOWN: if event.key == pygame.K_LEFT: x_change = -5 elif event.key == pygame.K_RIGHT: x_change = 5 if event.type = pygame.KEYUP: if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT: x_change = 0 ## </code to remove> print(event) x += x_change gameDisplay.fill((255,255,255)) car(x,y) pygame.display.update() clock.tick(60) pygame.display.quit() pygame.quit() quit()和## <code to remove>之间的代码，一切正常。这段代码是由什么引起的？

Answer 1

这是由if event.type = pygame.KEYUP:处的语法错误引起的。打开文件将使其立即关闭，但是在解释器（IDLE）中运行该文件将向您显示该错误。只需将其更改为if event.type == pygame.KEYUP:，一切正常。

更新：

文件中运行的代码而不是解释器（IDLE）不会总是打开。最好在IDLE中运行它。

代码：

import pygame

pygame.init()

display_width = 1280
display_height = 720

gameDisplay = pygame.display.set_mode((display_width,display_height))
pygame.display.set_caption("Racing Game")
clock = pygame.time.Clock()

black = (0,0,0)
white = (255,255,255)
carImg = pygame.image.load("racecar.png")

def car(x,y):
    gameDisplay.blit(carImg, (x,y))

x = display_width * 0.45
y = display_height * 0.8
x_change = 0
car_speed = 0

crashed = True
while crashed:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            crashed = False
        #############################
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                x_change = -5
            elif event.key == pygame.K_RIGHT:
                x_change = 5
        if event.type == pygame.KEYUP:
            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                x_change = 0
        #############################
        print(event)
    x += x_change
    gameDisplay.fill((255,255,255))
    car(x,y)
    pygame.display.update()
    clock.tick(60)

pygame.display.quit()   
pygame.quit()
quit()

Python窗口打开和关闭

1 个答案: