Python Pygame letter Keystrokes not registering?

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65876483/python-pygame-letter-keystrokes-not-registering

Answer 1

It's a matter of Indentation. You have to handle the events in the event loop rather than the application loop.

running = True
clock = pygame.time.Clock()
while running:

    clock.tick(FPS)
    for event in pygame.event.get(): 
        if event.type == pygame.QUIT:   
            running = False

    # INDENTATION

    #-->|
        
        # Keystrokes
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_a: #left
                playerX_change1 = -5
            if event.key == pygame.K_d: #right
                playerX_change1 = 5
        
        if event.type == pygame.KEYUP:
                if event.key == pygame.K_d or event.key == pygame.K_a:
                    playerX_change1 = 0