can python do some kernel stuff?

[Jimmy]

On May 23, 5:53 pm, "Diez B. Roggisch" <de... at nospam.web.de> wrote:
> Jimmy schrieb:
>
> > On May 23, 3:05 pm, Andrew Lee <fiacre.patr... at gmail.com> wrote:
> >> Jimmy wrote:
> >>> Hi to all
> >>> python now has grown to a versatile language that can
> >>> accomplish tasks for many different purposes. However,
> >>> AFAIK, little is known about its ability of kernel coding.
> >>> So I am wondering if python can do some kernel coding that
> >>> used to be the private garden of C/C++. For example, can python
> >>> intercept the input of keyboard on a system level? someone told me
> >>> it's a kernel thing, isn't it?
> >>http://wiki.python.org/moin/elmer
>
> > well, straightly speaking, how can I know a key is pressed on a system-
> > level if
> > using python?
>
> What has that todo with kernel programming? You can use e.g. pygame to
> get keystrokes. Or under linux, read (if you are root) the keyboard
> input file - I've done that to support several keyboards attached to a
> machine.
>
> And the original question: no, python can't be used as kernel
> programming language. Amongst other reasons, performance & the GIL
> prevent that.
>
> Diez

sorry, my aim is not limited to one particular program. Yes, many
library can
permit you to respond to keyboard event, however, what I want is a
universal
function. as long as a key is pressed, no matter where, my program can
repond.

I am quite strange with this topic. But according to my understanding,
any event, keyboard event
for example, once triggered, will be dilivered by keyboard driver to X
system, and then
any running program can either choose to respond or ignore. So my
question can be translated to:
how to make my program respond ?