一段简单的pygame代码，只在pygame界面背景绘制了一个背景图片
# -*- coding=utf-8 -*-
import sys
import pygame
pygame.init()
screen = pygame.display.set_mode((400,300))
bg_image = pygame.image.load('bg.jpeg')
bg_image = pygame.transform.scale(bg_image, (400, 300))
while True:
for event in pygame.event.get():
if event.type
