[wxPython] Problem with menus

I have just started using wxPython and now I am facing this problem:

I have set up a menu and set in the class where the menue is defined

EVT_MENU(self,103,command)

where command is a procedure (in another module). It is declared

def command(evt):
  print evt.GetInt()+

How can I find out the id 103 of the caller? GetInt always return 0 (and so
does GetSelection()).

Another (slight) problem is, that when I use
EVT_MENU_RANGE(self,100,105,command) then command is not called at all.

Can anybody help me?

TIA,

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Janos Blazi