Searching for a module to generate GUI events

[Stephan Kuhagen]

Hello

I'm searching for a Python Module which is able to generate GUI events on
different platforms (at least X11 and Windows, MacOSX would be nice), but
without being a GUI toolkit itself. So PyTk is not a choice, because I need
to use it, to control GUIs of other Programs. I want to generate Mouse
events (move, click etc.) and keyboard events and inject them directly into
the event-queue of the underlying window system. 

Does somebody know such a module or do I have to utilize platform specific
tools from within Python?

Regards and Thanks
Stephan