Pygame代码未执行（窗口不会打开）

Question

我目前正在尝试在pygame中重新创建Pong。这是我的代码：

import sys, pygame 
from pygame.locals import *


FPS = 60

BLACK = (0, 0, 0)
WHITE = (255, 255, 255)

WINDOWWIDTH = 400
WINDOWHEIGHT = 300
LINETHICKNESS = 10 
PADDLESIZE = 50
PADDLEOFFSET = 20 

def drawArena():
    DISPLAYSURF.fill((BLACK))
    pygame.draw.rect(DISPLAYSURF, WHITE, ((0,0),(WINDOWWIDTH,WINDOWHEIGHT)), LINETHICKNESS*2)
    pygame.draw.line(DISPLAYSURF, WHITE, ((WINDOWWIDTH/2),0),((WINDOWWIDTH/2),WINDOWHEIGHT), (LINETHICKNESS/4))

def drawPaddle(paddle):
    if paddle.bottom > (WINDOWHEIGHT - LINETHICKNESS):
       paddle.bottom = WINDOWHEIGHT - LINETHICKNESS
    elif paddle.top > LINETHICKNESS:
        paddle.top = LINETHICKNESS
    pygame.draw.rect(DISPLAYSURF, WHITE, paddle)


def drawBall(ball): 
    pygame.draw.rect(DISPLAYSURF, WHITE, ball) 

def moveBall(ball, ballDirX, ballDirY):
    ball.x += ballDirX
    ball.y += ballDirY
    return ball

def checkWallCollision(ball, ballDirX, ballDirY):
    if ball.top == (LINETHICKNESS) or ball.bottom == (WINDOWHEIGHT - LINETHICKNESS):
        ballDirY = ballDirY * -1
    if ball.left == (LINETHICKNESS) or ball.right == (WINDOWHEIGHT - LINETHICKNESS):
        ballDirX = ballDirX * -1
    return ballDirX, ballDirY

def checkPaddleCollision(ball, ballDirX, paddle1, paddle2):
    if ballDirX == -1 and paddle1.right == ball.left and paddle1.top < ball.top and paddle1.bottom > ball.bottom:
        return -1
    elif ballDirX == -1 and paddle2.left == ball.right and paddle2.top < ball.top and paddle2.bottom > ball.bottom:
        return -1
    else:
        return 1 

def checkPointScored(paddle1, ball, score, ballDirX):
    if ball.left == LINETHICKNESS:
        return 0
    elif ballDirX == -1 and paddle1.right == ball.left and paddle1.top < ball.top and paddle1.bottom > ball.bottom:
        score += 1
    elif ball.right == WINDOWWIDTH - LINETHICKNESS:
        score += 5 
        return score
    else: return score 

def aI(ball, ballDirX, paddle2):
    if ballDirX == -1:
        if paddle2.centery < (WINDOWHEIGHT/2):
            paddle2.y += 1
        elif paddle2.centery > (WINDOWHEIGHT/2):
            paddle2.y -= 1

    elif ballDirX == 1:
        if paddle2.centery < ball.centery:
            paddle2.y += 1
        else:
            paddle2.y -=1
    return paddle2

def displayScore(score):
    resultSurf = BASICFONT.render('Score = %s' %(score), True, WHITE)
    resultRect = resultSurf,get_rect()
    resultRect.topleft = WINDOWWIDTH = 150, 25
    DISPLAYSURF.blit(resultSurf, resultRect)

def main():
    pygame.init()
    global DISPLAYSURF
    global BASICFONT, BASICFONTSIZE 
    BASICFONTSIZE = 20 
    BASICFONT = pygame.font.Font('freesansbold.ttf', BASICFONTSIZE)

    FPSCLOCK = pygame.time.Clock()
    DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH,WINDOWHEIGHT))
    pygame.display.set_caption('Pong')

    ballX = WINDOWWIDTH/2 - LINETHICKNESS/2
    ballY = WINDOWHEIGHT/2 - LINETHICKNESS/2
    playerOnePosition = (WINDOWHEIGHT - PADDLESIZE) /2 
    playerTwoPosition = (WINDOWHEIGHT - PADDLESIZE) /2
    score = 0

    ballDirX = -1
    ballDirY = -1

    paddle1 = pygame.Rect(PADDLEOFFSET, playerOnePosition, LINETHICKNESS, PADDLESIZE)
    paddle2 = pygame.Rect(WINDOWWIDTH - PADDLEOFFSET - LINETHICKNESS, playerTwoPosition, LINETHICKNESS, PADDLESIZE)
    ball = pygame.Rect(ballX, ballY, LINETHICKNESS, LINETHICKNESS)
    drawArena()
    drawPaddle(paddle1)
    drawPaddle(paddle2)
    drawBall(ball)

    while True: #main game loop
        pygame.event.get()
        pygame.event.pump()
        for event in pygame.event.get():
            if event.type == QUIT:
                pygame.quit()
                sys.exit()

        drawArena()
        drawPaddle(paddle1)
        drawPaddle(paddle2)
        drawBall(ball)

        pygame.display.update()
        FPSCLOCK.tick(FPS)

    if __name__=='__main__':
        main()

我的问题是当我通过shell运行文件时输出为：

Python 3.6.0 |Continuum Analytics, Inc.| (default, Dec 23 2016, 11:57:41) on Windows (64 bits).
This is the Pyzo interpreter with integrated event loop for TK.
Type 'help' for help, type '?' for a list of *magic* commands.
Running script: "H:\pong.py"

然而，我创建的窗口没有出现，看起来好像它已经被打开或者某种类型的东西崩溃了。请帮我看看这是什么！

Answer 1

下面的代码运行正常，在命令行中显示输出事件，并可以处理事件并关闭窗口。

除了已经提到的（请参阅注释）缩进问题之外，捕获事件存在问题（请参阅输出注释的行），因此无法处理事件并关闭凸起的窗口。

import sys, pygame 
from pygame.locals import *

FPS = 60

BLACK = (0, 0, 0)
WHITE = (255, 255, 255)

WINDOWWIDTH   = 400
WINDOWHEIGHT  = 300
LINETHICKNESS = 10 
PADDLESIZE    = 50
PADDLEOFFSET  = 20 

def drawArena():
    DISPLAYSURF.fill((BLACK))
    pygame.draw.rect(DISPLAYSURF, WHITE, ((0,0),(WINDOWWIDTH,WINDOWHEIGHT)), LINETHICKNESS*2)
    pygame.draw.line(DISPLAYSURF, WHITE, ((int(WINDOWWIDTH/2)),0),((int(WINDOWWIDTH/2)),WINDOWHEIGHT), (int(LINETHICKNESS/4)))

def drawPaddle(paddle):
    if paddle.bottom > (WINDOWHEIGHT - LINETHICKNESS):
       paddle.bottom = WINDOWHEIGHT - LINETHICKNESS
    elif paddle.top > LINETHICKNESS:
        paddle.top = LINETHICKNESS
    pygame.draw.rect(DISPLAYSURF, WHITE, paddle)

def drawBall(ball): 
    pygame.draw.rect(DISPLAYSURF, WHITE, ball) 

def moveBall(ball, ballDirX, ballDirY):
    ball.x += ballDirX
    ball.y += ballDirY
    return ball

def checkWallCollision(ball, ballDirX, ballDirY):
    if ball.top == (LINETHICKNESS) or ball.bottom == (WINDOWHEIGHT - LINETHICKNESS):
        ballDirY = ballDirY * -1
    if ball.left == (LINETHICKNESS) or ball.right == (WINDOWHEIGHT - LINETHICKNESS):
        ballDirX = ballDirX * -1
    return ballDirX, ballDirY

def checkPaddleCollision(ball, ballDirX, paddle1, paddle2):
    if ballDirX == -1 and paddle1.right == ball.left and paddle1.top < ball.top and paddle1.bottom > ball.bottom:
        return -1
    elif ballDirX == -1 and paddle2.left == ball.right and paddle2.top < ball.top and paddle2.bottom > ball.bottom:
        return -1
    else:
        return 1 

def checkPointScored(paddle1, ball, score, ballDirX):
    if ball.left == LINETHICKNESS:
        return 0
    elif ballDirX == -1 and paddle1.right == ball.left and paddle1.top < ball.top and paddle1.bottom > ball.bottom:
        score += 1
    elif ball.right == WINDOWWIDTH - LINETHICKNESS:
        score += 5 
        return score
    else: return score 

def aI(ball, ballDirX, paddle2):
    if ballDirX == -1:
        if paddle2.centery < (WINDOWHEIGHT/2):
            paddle2.y += 1
        elif paddle2.centery > (WINDOWHEIGHT/2):
            paddle2.y -= 1

    elif ballDirX == 1:
        if paddle2.centery < ball.centery:
            paddle2.y += 1
        else:
            paddle2.y -=1
    return paddle2

def displayScore(score):
    resultSurf = BASICFONT.render('Score = %s' %(score), True, WHITE)
    resultRect = resultSurf,get_rect()
    resultRect.topleft = WINDOWWIDTH = 150, 25
    DISPLAYSURF.blit(resultSurf, resultRect)

def main():
    pygame.init()
    global DISPLAYSURF
    global BASICFONT, BASICFONTSIZE 
    BASICFONTSIZE = 20 
    BASICFONT = pygame.font.Font('freesansbold.ttf', BASICFONTSIZE)

    FPSCLOCK = pygame.time.Clock()
    DISPLAYSURF = pygame.display.set_mode((WINDOWWIDTH,WINDOWHEIGHT))
    pygame.display.set_caption('Pong')

    ballX = WINDOWWIDTH/2 - LINETHICKNESS/2
    ballY = WINDOWHEIGHT/2 - LINETHICKNESS/2
    playerOnePosition = (WINDOWHEIGHT - PADDLESIZE) /2 
    playerTwoPosition = (WINDOWHEIGHT - PADDLESIZE) /2
    score = 0

    ballDirX = -1
    ballDirY = -1

    paddle1 = pygame.Rect(PADDLEOFFSET, playerOnePosition, LINETHICKNESS, PADDLESIZE)
    paddle2 = pygame.Rect(WINDOWWIDTH - PADDLEOFFSET - LINETHICKNESS, playerTwoPosition, LINETHICKNESS, PADDLESIZE)
    ball = pygame.Rect(ballX, ballY, LINETHICKNESS, LINETHICKNESS)
    drawArena()
    drawPaddle(paddle1)
    drawPaddle(paddle2)
    drawBall(ball)

    while True: #main game loop
        # pygame.event.get()
        # pygame.event.pump()

        for event in pygame.event.get():
            print("event", event)
            if event.type == QUIT:
                pygame.quit()
                sys.exit()

        drawArena()
        drawPaddle(paddle1)
        drawPaddle(paddle2)
        drawBall(ball)

        pygame.display.update()
        FPSCLOCK.tick(FPS)

if __name__=='__main__':
    main()