On 11/07/17 14:16, Albert-Jan Roskam wrote:
From: Python-list <python-list-bounces+sjeik_appie=hotmail....@python.org> on behalf
of Dan Sommers <d...@tombstonezero.net>
Sent: Friday, July 7, 2017 2:46 AM
To: python-list@python.org
Subject: Re: Test 0 and false since false is 0
On Thu, 06 Jul 2017 19:29:00 -0700, Sayth Renshaw wrote:
I have tried or conditions of v == False etc but then the 0's being
false also aren't moved. How can you check this at once?
Maybe this will help:
Python 3.5.3+ (default, Jun 7 2017, 23:23:48)
[GCC 6.3.0 20170516] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> False == 0
True
>>> False is 0
False
=====> Just wondering: Is this 'is' test depending on an implementation detail
of cPython (small ints, I forgot how small 0-255 maybe, are singletons)?
No, it's not an implementation detail. True and False are singletons,
and are different objects from 1 and 0 (they behave differently when
converted to strings, for example). Now, relying on "0 is 0" being true
would be relying on an implementation detail, but you weren't going to
do that, were you?
--
Rhodri James *-* Kynesim Ltd
--
https://mail.python.org/mailman/listinfo/python-list
