Pygame：如何更改背景颜色？

Question

I am new to python. Previously I have used C and C++. I am creating a pygame and I am using rapidtables.com for this work but however my game window is still not showing the required color.(It's showing but only when I close my game window). Well here is my code-

 #Space Invaders from turtle import Screen, screensize import pygame #Intialize the game pygame.init() #formation of screen screen = pygame.display.set_mode((800,600)) #Title pygame.display.set_caption("Space Invaders") #Game loop done = False while not done: for event in pygame.event.get(): if event.type == pygame.QUIT: done = True pygame.display.flip() #RGB, Red, Green and blue screen.fill((255, 0, 0)) pygame.display.update()

Answer 1

My game window is still not showing the required color (It's showing but only when I close my game window).

This is happening because you aren't changing the window color the game loop. The reason why you only see it when you close the game window is because when you close the window, the pygame.QUIT event is triggered. In your code, when that event is triggered, you set done to True , meaning the loop will stop running and the code outside of the loop will be executed. Since you are filling the window and updating the display outside of the loop, the screen only gets colored when the loop is no longer running (only when the pygame.QUIT event is triggered). So to fix that, move screen.fill((255, 0, 0)) to inside your game loop.

Modified Game Loop:

while not done:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True

    # RGB, Red, Green and blue
    screen.fill((255, 0, 0))
    pygame.display.flip()
pygame.quit()
sys.exit(0)

I added pygame.quit and sys.exit(0) in order to quit the game and end the program (don't forget to add import sys ).

Full Code:

# Space Invaders
from turtle import Screen, screensize
import pygame
import sys

# Intialize the game
pygame.init()

# formation of screen
screen = pygame.display.set_mode((800, 600))

# Title
pygame.display.set_caption("Space Invaders")

# Game loop
done = False

while not done:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            done = True

    # RGB, Red, Green and blue
    screen.fill((255, 0, 0))
    pygame.display.flip()
pygame.quit()
sys.exit(0)