Pushing and Popping document handlers

[Thomas Gagne]

I should probably wait to ask this question until I finishe reading McGrath's
"XML Processing with Python", but I was wondering...

.. I create a document handler for a file to handle batches of POs.  Inside
the startElement() methods there's a bunch of if name == "yadayada" sections
that appear as though I'm working too hard.  I was wondering there was a way
to switch document handlers based on the tag coming in?

For instance, I'd like to have one handler for PO header information and a
separate one for each of the lines on a PO.

My code is already working (as far as I can tell) but I think it would be
easier if I were able to have separate document handlers.