[XML-SIG] RE: DOM circular refs
Andrew M. Kuchling
Fri, 9 Oct 1998 15:26:25 -0400 (EDT)
>Being a Python newbie, I didn't know about __getattr__ and __setattr__ ten
>minutes ago. Maybe mucking with those would be a good way of providing a
>readonly documentElement attribute for Document that raises an exception
>when set and returns a new proxy when got. Currently I got rid of the
>attribute in favor of a function call get_documentElement(). What do the
>python gurus say?
Yes, I've been meaning to write convenience __getattr__ and
__setattr__ functions on the Node class that automatically call
.get_childNodes(), for example, when you try to access .childNodes.
It's a pity that's required, because it'll make accessing .childNodes
slower than .get_childNodes() -- you'll call __getattr__ first, which
will then call get_childNodes() for you -- but it seems unavoidable.
Implementing those two methods are first on my list for tonight.
A.M. Kuchling http://starship.skyport.net/crew/amk/
The past is only partly irrecoverable. The clerisy should accord it at least
as much courtesy as they offer to the future.
-- Robertson Davies, _A Voice from the Attic_