之前按下另一个键后启用键

Question

I'm trying to make it so that pressing 'r' key will only work after the user pressed 'enter' anytime before. But right now in #1 I can only press 'r' key if I'm holding 'enter' key. I tried in #2 but then the user can just press 'r' without pressing 'enter'.

#1
run = True  
while run:
    for event in pygame.event.get():  
        if event.type == pygame.QUIT:  
            run = False
    keys = pygame.key.get_pressed()
    if keys[pygame.K_RETURN] or [pygame.K_KP_ENTER]:
        print("Do something")
        if keys[pygame.K_r]:
            print("Do something")
    pygame.display.update()
pygame.quit() 

#2
run = True  
while run:
    for event in pygame.event.get():  
        if event.type == pygame.QUIT:  
            run = False
    keys = pygame.key.get_pressed()
    if keys[pygame.K_RETURN] or [pygame.K_KP_ENTER]:
        print("Do something")
    if keys[pygame.K_r]:
        print("Do something")
    pygame.display.update()
pygame.quit() 

Answer 1

It is very easy to do. First you need to create a new bool, for example pressed . And then set it to False . Then check if key enter is pressed. If it is then set bool pressed to True . And then check if key r is pressed and if bool pressed is True . So your code should look like this:

pressed = False
while run:
    for event in pygame.event.get():  
        if event.type == pygame.QUIT:  
            run = False
    keys = pygame.key.get_pressed()
    if keys[pygame.K_RETURN]:
        pressed = True
    if keys[pygame.K_r] and pressed:
        print("Do something")
    pygame.display.update()

I hope it helped!