import Tkinter

root = Tkinter.Tk()

msg = Tkinter.Label(text="Press any key")
keymsg = Tkinter.Label()

msg.pack()
keymsg.pack()

root.bind("<KeyPress>",
        lambda event: keymsg.configure(text="Key pressed %s" % event.keysym))
root.bind("<KeyRelease>",
        lambda event: keymsg.configure(text="Key released %s" % event.keysym))

root.mainloop()