select all subobjects

Hy guys,
is there a way to select all the sub-objects of a geometry? i´m trying to make a script that selects all the egdes and apply a chamfer to them, but when i use the "select all" command the listener shows the selecetd edges numbers (something like this - "$.EditablePoly.SetSelection #Edge #{1..12}"). What i´m doing is to use a high number, so in the most of the times all the edges are selected, but i was wondering if there´s a way to do it selecting all the edges precisely.
Thanks in advance,

Jsrocha