Question

我是学习Python的初学者，当我调试从书中复制的一系列代码时，我遇到了一个问题，我得到一个白色的屏幕窗口，而不是带有图案的窗口，这里是代码：

import pygame, sys, random
import pygame.locals as GAME_GLOBALS
import pygame.event as GAME_EVENTS
pygame.init()
windowWidth = 640
windowHeight = 480
surface = pygame.display.set_mode((windowWidth, windowHeight))
pygame.display.set_caption('Pygame Shapes!')

while True:
    surface.fill((200, 0, 0))
    pygame.draw.rect(surface, (255, 0, 0), (random.randint(0, windowWidth), random.randint(0, windowHeight), 10, 10))

greenSquareX = windowWidth / 2
greenSquareY = windowHeight / 2

while True:
    surface.fill((0, 0, 0))
    pygame.draw.rect(surface, (0, 255, 0),
     (greenSquareX, greenSquareY, 10, 10))
    greenSquareX += 1
    # greenSquareY += 1
    pygame.draw.rect(surface, (0, 0, 255),
       (blueSquareX, blueSquareY, 10, 10))

    blueSquareX = 0.0
    blueSquareY = 0.0
    blueSquareVX = 1
    blueSquareVy = 1

while True:
    surface.fill((0, 0, 0))
    pygame.draw.rect(surface, (0, 0, 255),
       (blueSquareX, blueSquareY, 10, 10))
    blueSquareX += blueSquareVX
    blueSquareY += blueSquareVY
    blueSquareVX += 0.1
    blueSquareVY += 0.1

    for event in GAME_EVENTS.GET():
        if event.type == GAME_GLOBALS.QUIT:
            pygame.quit()
            sys.exit()
    pygame.dispaly.update()

我得到的第一个错误是：E1101:Module 'pygame' has no 'init' member'(4 ,1)。我以前用pygame.init()运行了其他Python代码，结果很好;但这次我得到一个白色的窗口。我的代码出了什么问题？谢谢你的帮助！

Answer 1

这需要我进行大量的调试才能修复，哈哈。

首先，您没有在任何while循环中转义或更新。代码进入您的第一个while循环后，在此之后没有任何内容（pygame.display）更新 - 导致您的白屏综合症。

此外，请一致地命名变量并检查代码中的拼写错误。您创建了一个blueSquareVy变量，以便稍后尝试将其引用为blueSquareVY，并且您在代码末尾拼错了pygame.display.update()。资本化很重要 - 这只是一些拼写错误！

代码中也存在逻辑错误。将图形绘制到屏幕上后，不填充窗口表面。看看你的变量，似乎你想要小方块移动。您可以在while循环之外创建位置变量，就像在循环中创建它们一样，它们会在循环的每次迭代中以其初始值重新创建。

带注释和错误修复的代码：

import pygame, sys, random
import pygame.locals as GAME_GLOBALS
import pygame.event as GAME_EVENTS
pygame.init()
windowWidth = 640
windowHeight = 480
surface = pygame.display.set_mode((windowWidth, windowHeight))
pygame.display.set_caption('Pygame Shapes!')

# Renamed variables to be consistent
# Moved variables out of the while loop
greenSquareX = windowWidth / 2
greenSquareY = windowHeight / 2
blueSquareX = 0.0
blueSquareY = 0.0
blueSquareVX = 1
blueSquareVY = 1

# Joined the two while loops into one
while True:
    surface.fill((200, 0, 0))
    pygame.draw.rect(surface, (255, 0, 0), (random.randint(0, windowWidth), random.randint(0, windowHeight), 10, 10))

    surface.fill((0, 0, 0))
    pygame.draw.rect(surface, (0, 255, 0),
     (greenSquareX, greenSquareY, 10, 10))
    greenSquareX += 1
    greenSquareY += 1

    pygame.draw.rect(surface, (0, 0, 255),
       (blueSquareX, blueSquareY, 10, 10))
    blueSquareX += blueSquareVX
    blueSquareY += blueSquareVY
    blueSquareVX += 0.1
    blueSquareVY += 0.1

    # Do not capitalize the .get() method for pygame.event class
    for event in GAME_EVENTS.get():
        if event.type == GAME_GLOBALS.QUIT:
            pygame.quit()
            sys.exit()

    # Misspelled pygame.display
    pygame.display.update()

希望这有帮助！

运行pygame代码，它会显示＆＃39; Module＆＃39; pygame＆＃39;没有＆＃39; init＆＃39;构件＆＃39;和白色屏幕窗口

1 个答案: