我让它工作了。好的，这就是我所做的。
1.完整的操作系统擦除-全新的Debian安装（因为上帝知道我在实验中可能搞砸了什么）
1.按照安装PySDL 2时抱怨的那样设置python env
1.通过pip安装pysdl 2和sudo安装sdl 2-dev
最重要的部分是运行UpdateWindow（w）和RenderPresent（r），这在PySDL文档中没有提到，但可能是因为它是一个利基用例场景。
简单地说，这可能不是完美的代码，因为我不是Maven。但由于所有的Maven都懒得帮助解决这类问题，这是你得到的最好的：

import ctypes
import sys
from sdl2 import *
import time

SDL_Init(SDL_INIT_EVENTS)

w = SDL_CreateWindow(b"test", 0,0, 800,600, SDL_WINDOW_INPUT_FOCUS | SDL_WINDOW_FULLSCREEN_DESKTOP | SDL_WINDOW_HIDDEN)
SDL_ShowWindow(w)
SDL_RaiseWindow(w)

window_surface = SDL_GetWindowSurface(w)
r = SDL_CreateSoftwareRenderer(window_surface)
#r = sdl2.ext.Renderer(w, -1, (800,600), sdl2.SDL_RENDERER_SOFTWARE)

#sprite_factory = sdl2.ext.SpriteFactory(sdl2.ext.TEXTURE, renderer=r)
#sprite = sprite_factory.from_image("resources/imgs/fr.png")

event = SDL_Event()

running = True
while running:

        while SDL_PollEvent(event) != 0:
                print("events were present", event.key.keysym.sym)
                #print(SDL_GetKeyName(event.key.keysym.sym))
                if event.type == SDL_QUIT:
                        running = False
                        break

                if event.type == SDL_KEYDOWN:
                        #if event.key.keysym.sym == sdl2.SDLK_ESCAPE:
                        running = False
                        print("keydown detected")
                        break

        SDL_RenderClear(r)

        #sprite_render = sprite_factory.create_sprite_render_system(r)
        #sprite_render.render(sprite, x=100, y=100)

        #WHITE = sdl2.ext.Color(255,255,255,255)
        #r.draw_rect((5,5,64,64), WHITE)

        SDL_UpdateWindowSurface(w)
        SDL_RenderPresent(r)

SDL_DestroyWindow(w)
SDL_Quit()
exit()

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