How to Prevent Excessively Fast Movement When Handling Keyboard Input in Pygame?

Keyboard Input in Pygame: Handling Keystroke Events

In developing a simple game using pygame 1.9.2, you may encounter an issue where a ship controlled by arrow keys moves excessively fast. This problem stems from continuously registering key presses while the keys are held down.

To address this, instead of relying on pygame.key.get_pressed(), which retrieves currently pressed keys, consider handling keystroke events. The KEYDOWN event captures keys pressed within the current frame, ensuring that movements only occur once per keystroke.

events = pygame.event.get()
for event in events:
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_LEFT:
            location -= 1
        if event.key == pygame.K_RIGHT:
            location += 1

However, if continuous movement is desired, you may implement limitations to restrict movement frequency. One approach is to set a maximum frame rate or use a counter to limit movement every few ticks.

move_ticker = 0
keys = pygame.key.get_pressed()
if keys[K_LEFT]:
    if move_ticker == 0:
        move_ticker = 10
        location -= 1
        if location == -1:
            location = 0
if keys[K_RIGHT]:
    if move_ticker == 0:
        move_ticker = 10
        location += 1
        if location == 5:
            location = 4

Additionally, during the game loop, you would decrement the counter:

if move_ticker > 0:
    move_ticker -= 1

This ensures that movement occurs only every 10 frames.

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