[Python-Dev] Rich comparisons shortcut
Jewett, Jim J
jim.jewett at eds.com
Tue Mar 30 16:11:31 EST 2004
Version 2.215 (Mar 21, 2004) of object.c assumes that
identity implies equality.
I won't rehash the discussion about custom objects and NaN.
I do think the decision should be reasonably consistent.
The current CVS version shortcuts for == and !=, but not
for the other operators.
Normally,
x == y implies
x <= y
x >= y
not x < y
not x > y
(in addition to)
not x != y
I think any object that intentionally violates these rules
is likely to also violate the (is implies ==) assumption.
-jJ
More information about the Python-Dev
mailing list