How to determine what called __cmp__ method?

[David Ascher]

On Fri, 20 Oct 2000, Pearu Peterson wrote:
> 
> I have the following situation:
> 
> >>> foo(1) < foo(2)
> 
> where 
> 
> class foo:
> 	def __init__(self,i):
> 		self.i = i
> 	def __cmp__(self,obj):
> 		# who called me???
> 		return self.i<obj.i or -(self.i>obj.i) or 0
> 
> The question is how to determine inside __cmp__ method where it was
> called? That is I want to know was it called for evaluating
> either inequality '<', or '>', or '<=', or ...?

I don't think there's a way.  The logic is hidden in the C layer, and you
don't get to see it.

Now, with rich comparisons.. =)  (If anyone is interested in taking on the
work of creating the rich comparisons patches, pushing the PEP through,
etc., get in touch with me).
 
--david ascher