metaclasses for type comparison

[David Eppstein]

In article <q6o1mv0tt1lgnhmmcvig9926rmuimc60he at 4ax.com>,
 Gon?alo Rodrigues <op73418 at mail.telepac.pt> wrote:

> ><= is supposed to be a total ordering, so it is not a good idea to use 
> >it for partial orders such as subclass hierarchies.
> 
> Is it?  I never came across such a supposition, which in itself says
> nothing because I have very little experience anyway, but what about
> set inclusion in the sets module which can be written as <=?

I don't have 2.3 yet, so haven't used sets yet, but what happens if you 
try to sort a list of sets?

I found a message 
<http://mail.python.org/pipermail/python-bugs-list/2003-January/015454.h
tml> from Guido wondering about this but didn't see what the response 
was...

-- 
David Eppstein                      http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science