More damage to intuition (was RE: [Python-Dev] Comparison of recursive objects)

[Guido van Rossum]

> > My only concern is that under the old schele, two different numeric
> > extension types that somehow can't be compared will end up being
> > *equal*.  To fix this, I propose that if the names compare equal, as a
> > last resort we compare the type pointers -- this should be consistent
> > too.
> 
> Agreed, and sounds fine!

Checked in now.

While fixing the test_b1 code again, which depends on this behavior, I
thought of a refinement: it wouldn't be hard to make None compare
smaller than *anything* (including numbers).

Is this worth it?

diff -c -r2.113 object.c
*** object.c	2001/01/22 15:59:32	2.113
--- object.c	2001/01/22 16:03:38
***************
*** 550,555 ****
--- 550,561 ----
  		PyErr_Clear();
  	}
  
+ 	/* None is smaller than anything */
+ 	if (v == Py_None)
+ 		return -1;
+ 	if (w == Py_None)
+ 		return 1;
+ 
  	/* different type: compare type names */
  	if (v->ob_type->tp_as_number)
  		vname = "";


--Guido van Rossum (home page: http://www.python.org/~guido/)