Python 窗口打开和关闭

Question

我一直在关注 here 的教程构建一个小型 python 游戏。这将是其背后的代码:

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
        ## <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()

当我尝试运行它时，窗口打开并立即关闭。但是，如果我删除两者之间的代码 ## <code to remove>和## </code to remove>一切正常。这段代码中是什么导致了这种情况的发生？

Answer 1

这是由 if event.type = pygame.KEYUP: 处的语法错误引起的。打开该文件将导致它立即关闭，但在解释器(IDLE)中运行它会显示该错误。只需将其更改为 if event.type == pygame.KEYUP: 一切都会正常工作。

更新:

从文件而不是解释器(IDLE)运行代码并不总是打开。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()