pygame背景不发短信

Question

I'm just learning GUI programming using python 3.2 and pygame 1.8. From what I understand the following code should display a white background. However all I get is a black screen. Also, I'm using IDLE in Windows 7 if that matters:

import pygame
pygame.init()
screen = pygame.display.set_mode((640, 480))
background = pygame.Surface(screen.get_size())
background.fill((255, 255, 255))
screen.blit(background, (0, 0))

Answer 1

You must have a main loop that updates the screen. This code should work:

import pygame

pygame.init()
screen = pygame.display.set_mode((640, 480))

background = pygame.Surface(screen.get_size())
background.fill((255, 255, 255))

while True:
    screen.blit(background, (0, 0))
    pygame.display.update()

Answer 2

You forgot to update the screen.

import pygame
pygame.init()
screen = pygame.display.set_mode((640, 480))
background = pygame.Surface(screen.get_size())
background.fill((255, 255, 255))
screen.blit(background, (0, 0))

pygame.display.update()

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

Answer 3

You don't blit the backgound you just put the fill part in the loop. Also you are forgetting the pygame.display.update()