Pygame 一直说视频系统未初始化

如何解决Pygame 一直说视频系统未初始化

每次运行时都会弹出错误提示

文件“c:\Users\camer\pygfa.py”，第 9 行，

对于 pygame.event.get() 中的事件： pygame.error: 视频系统未初始化

我也在开始时初始化一切

import pygame
from pygame.locals import *
import time
import os
import sys
from sys import exit
pygame.init()

screen = pygame.display.set_mode((640,480),32)

font = pygame.font.SysFont("arial",32); font_height = font.get_linesize()

while True:

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

screen.fill((255,255,255))

pressed_key_text = []

pressed_keys = pygame.key.get_pressed()

y = font_height

for key_constant,pressed in enumerate(pressed_keys):
    if pressed:

        key_name = pygame.key.name(key_constant)

        text_surface = font.render(key_name " pressed",True,(0,0))
        screen.blit(text_surface,(8,y)) y = font_height

pygame.display.update()