[Visualpython-users] Keyboard Interactions

How i can chack if key is pressed?
Or when I press arrow Left and arrow Up my "ball" move only in one
direction.


# -*- coding: UTF-8 -*-
> from visual import *
>
> scene = display( title='Przykład', x=0, y=0, width=640, height=480,
> center=( 0, 0, 0 ), background=( 0, 0, 0 ), fov=1.0 )
> ball = sphere( pos=( 0, 0, 0 ), radius=0.5 )
>
> scene.autoscale = False
> scene.range=( 10, 10, 10 )
>
> while True:
>     if scene.kb.keys:
>         key = scene.kb.getkey()
>         if key == 'right':
>             ball.pos.x += 1
>         if key == 'left':
>             ball.pos.x -= 1
>         if key == 'up':
>             ball.pos.y += 1
>         if key == 'down':
>             ball.pos.y -= 1
>