Python 为什么我没有收到打印消息？

这是因为event.type不能同时为KEYUP和K_空格。 将代码重写为：

 while running:
        screen.fill((255,255,255))

        screen.blit(background,(0,0))   
        
        for event in pygame.event.get():

            if event.type == pygame.QUIT:
                running = False


# keystroke controlling   i am not getting this print message 

            if event.type == pygame.KEYDOWN:
                if event.type == pygame.K_SPACE:

                    print("space is pressed ")

            if event.type == pygame.KEYUP:

                if event.type == pygame.K_SPACE:

                    print("released")
                                 
        
        playerx += playerx_change
        player(playerx , playery)
        cactus(cactusx , cactusy)
        pygame.display.update()

game()

---

这是因为event.type不能同时为KEYUP和K_空格。 将代码重写为：

 while running:
        screen.fill((255,255,255))

        screen.blit(background,(0,0))   
        
        for event in pygame.event.get():

            if event.type == pygame.QUIT:
                running = False


# keystroke controlling   i am not getting this print message 

            if event.type == pygame.KEYDOWN:
                if event.type == pygame.K_SPACE:

                    print("space is pressed ")

            if event.type == pygame.KEYUP:

                if event.type == pygame.K_SPACE:

                    print("released")
                                 
        
        playerx += playerx_change
        player(playerx , playery)
        cactus(cactusx , cactusy)
        pygame.display.update()

game()

---

event.type不能同时为KEYUP和K_空格您必须使用

event.key==pygame.K_空格

而不是

event.type==pygame.K_空格

event.type不能同时为KEYUP和K_空格您必须使用

event.key==pygame.K_空格

而不是

event.type==pygame.K_空格