Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!news.swapon.de!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Marko Rauhamaa <marko@pacujo.net>
Newsgroups: comp.lang.python
Subject: Re: 'is not' or '!='
Date: Tue, 19 Aug 2014 20:36:53 +0300
Organization: A noiseless patient Spider
Lines: 12
Message-ID: <871tsc7556.fsf@elektro.pacujo.net>
References: <lsto1s$6gk$1@dont-email.me> <87fvgt7c4i.fsf@elektro.pacujo.net> <lstpe1$gbn$1@dont-email.me> <53F27340.90604@stoneleaf.us> <CALvWhxuXPLXwJhz-y1prvARJutP6BYpE_bbjRrH-8AmbGnnmjg@mail.gmail.com> <CAHXoDSDmNR=XXZ=miL5VD3j7TMNZ-kKRuXgGX5=9hS6ZASvD3w@mail.gmail.com> <CANc-5Uxo808N8CMuUBjEj1zX_EG2Mk7M4mDOUn4HBHPh3R2naA@mail.gmail.com> <mailman.13154.1408466618.18130.python-list@python.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Info: mx05.eternal-september.org; posting-host="ff5cf27ef3d5b31f034d3b72bdc27a41"; logging-data="2166"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX185RoWFNBfFhsm60bDPHUv1"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)
Cancel-Lock: sha1:zlskYA86rKMjgdbbJuyj5j/VjZ0= sha1:TfiS+TtLJOSGd/EP6YO3S6PAmJo=
Xref: csiph.com comp.lang.python:76583

Ian Kelly <ian.g.kelly@gmail.com>:

> When I need to do this, I use:
>
>     SENTINEL = object()
>
> It's still a singleton, and why should a sentinel be mutable?

Private enums are often nicer in that they provide str() and repr().


Marko