New submission from Jean-Paul Calderone <exar...@divmod.com>:
Here's an example of a metaclass with a __cmp__ special:
exar...@boson:/tmp$ cat metacmp.py
class X(type):
def __cmp__(self, other):
return -1
class Y:
__metaclass__ = X
print Y < Y
exar...@boson:/tmp$ python2.5 metacmp.py
True
exar...@boson:/tmp$ python2.6 metacmp.py
False
exar...@boson:/tmp$
In Python 2.6 and Python 2.7a1, the __cmp__ isn't even invoked, as it
was in Python 2.5.
This breaks the ordering of item types in Axiom. A brief search reveals
that sympy also ran into the problem, but they may have since worked
around it.
----------
components: Interpreter Core
messages: 96334
nosy: exarkun
severity: normal
status: open
title: metaclass __cmp__ is ignored
versions: Python 2.6, Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue7491>
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