Can you capture Key-Release events in Tkinter?

[Nick Perkins]

I am trying to make a little interactive game using
Tkinter Canvas widget.  (Python 2.0 - win NT - PythonWin..)

It seems that only KeyPress events are available, and not key-release
events.
Is this a limitation of Tk itself, or a limitation of Tkinter, or is there a
way to do it?
( maybe i should consider wxWindows or something else..?)