On May 24, 12:34 am, "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote: > Jimmy schrieb: > > > > > On May 23, 11:14 pm, Jimmy <[EMAIL PROTECTED]> wrote: > >> On May 23, 5:53 pm, "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote: > > >>> Jimmy schrieb: > >>>> On May 23, 3:05 pm, Andrew Lee <[EMAIL PROTECTED]> 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 ? > > > maybe I'd better elaborate on my question. Back to my original > > question: > > intercept keyboard event on a system level. If you are writing program > > in > > emacs, of course, the keyboard inputs are meant for emacs only. What > > I > > want is no matter what program you're running, keyboard events can be > > anyway caught by my program. > > > Am I clear with myself? :) > > Do you want to intercept the call (prevent that it is passed through to > e.g. emacs), or are you merely interested in getting it? If the latter, > you can (as root) access the /dev/input keyboard device and get the > scan-codes. > > The former is more complicated - without research I don't know out of my > head how to accomplish that. But it must be possible, as e.g. KDE > observes global key-shortcuts. Most probably a X-server thing. > > Diez
thanks, right now I am content with just knowing a key is pressed. as you said, I checked /etc/input/event1 which seems the input of keyboard. Then I got some extremely strange code. however, how can I just simply know a key is pressed? -- http://mail.python.org/mailman/listinfo/python-list
