[Python-Dev] Should the default equality operator compare values instead of identities?
mwh at python.net
Tue Nov 8 00:02:12 CET 2005
"Martin v. Löwis" <martin at v.loewis.de> writes:
> BJörn Lindqvist wrote:
>> How would the value equality operator deal with recursive objects?
>> class Foo:
>> def __init__(self):
>> self.foo = self
>> Seems to me that it would take atleast some special-casing to get
>> Foo() == Foo() to evalute to True in this case...
> This is sort-of supported today:
> >>> a=
> >>> a.append(a)
> >>> b=
> >>> b.append(b)
> >>> a == b
Uh, I think this changed in Python 2.4:
>>> a = 
>>> b = 
>>> a == b
Traceback (most recent call last):
File "<stdin>", line 1, in ?
RuntimeError: maximum recursion depth exceeded in cmp
First of all, email me your AOL password as a security measure. You
may find that won't be able to connect to the 'net for a while. This
is normal. The next thing to do is turn your computer upside down
and shake it to reboot it. -- Darren Tucker, asr
More information about the Python-Dev