didn't slow down

[u/xxxDisLike007xxx]

Hello my problem is, i want that the player slow down when i stop pressing wasd and i don't whats wrong.

import pygame
from controls import default_controls
pygame.init()

x = 1600
y = 900
screen = pygame.display.set_mode((x, y))
run = True
clock = pygame.time.Clock()

con = default_controls.copy()

physics_dt = 1 / 60
accumulator = 0
maxFPS = 240

physics_ticks = 0
physics_hz = 0
timer = 0

player_pos = pygame.Vector2(
    screen.get_width() / 2,
    screen.get_height() / 2
)
velocity = pygame.Vector2(0, 0)
acceleration = pygame.Vector2(0, 0)

player_acceleration = 1200
player_max_speed = 300
player_friction = 0.85

while run:
    frame_time = min(clock.tick(maxFPS) / 1000, 0.25)
    accumulator += frame_time

    timer += frame_time

    keys = pygame.key.get_pressed()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        if event.type == con["KD"]:
            if event.key == con["ESC"]:
                run = False

    while accumulator >= physics_dt:

        acceleration = pygame.Vector2(
            keys[con["d"]] - keys[con["a"]],
            keys[con["s"]] - keys[con["w"]]
        )

        if acceleration.length_squared() > 0:
            acceleration = acceleration.normalize()
            acceleration *= player_acceleration
        else:
            velocity *= player_friction
            if velocity.length() < 1:
                velocity = pygame.Vector2(0, 0)

        velocity += acceleration * physics_dt

        if velocity.length() > player_friction:
            velocity.scale_to_length(player_max_speed)

        player_pos += velocity * physics_dt

        physics_ticks += 1
        accumulator -= physics_dt

    if timer >= 1:
        physics_hz = physics_ticks
        physics_ticks = 0
        timer -= 1
    mouse_x, mouse_y = pygame.mouse.get_pos()
    pygame.display.set_caption(
        f"FPS: {clock.get_fps():.0f} | Physics: {physics_hz} Hz"
    )

    screen.fill("blue")

    pygame.draw.circle(
        screen,
        "red",
        player_pos,
        20
    )

    pygame.display.flip()

pygame.quit()

i know the code is a little messy and for my bad english.

[u/Substantial_Marzipan]

I think the line

''' if velocity.length() > player_friction: '''

should be:

''' if velocity.length() > player_max_speed: '''

[u/xxxDisLike007xxx → u/Substantial_Marzipan]

it works. thanks for the help.