pygame一按f就退回原窗口大小，请问为什么？

Question

pygame一按f就退回原窗口大小，本人mac os，求助！

import pygame
import sys

def screen_event():
    global screen,size,key_pressed
    #初始大小
    size = pygame.display.list_modes()[8]
    screen = pygame.display.set_mode(size, pygame.RESIZABLE)
    #关闭窗口
    for event in pygame.event.get(): 
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()  
    #全屏操作
    key_pressed = pygame.key.get_pressed()
    if key_pressed[pygame.K_f]:
        size = pygame.display.list_modes()[0]
        screen = pygame.display.set_mode(size, pygame.FULLSCREEN|pygame.HWSURFACE)
    if key_pressed[pygame.K_ESCAPE]:
        size = pygame.display.list_modes()[8]
        screen = pygame.display.set_mode(size)

pygame.init()

while True:
    screen_event()
    #填充背景
    screen.fill((0,0,0))
    #更新界面
    pygame.display.flip()

Answer 1

https://blog.csdn.net/f156207495/article/details/78570808