Groups > comp.lang.python > #197779

Re: Coming In Python 3.15: Sentinel Values

Path	csiph.com!eternal-september.org!feeder.eternal-september.org!nntp.eternal-september.org!tundraware.eternal-september.org!.POSTED!not-for-mail
From	Tim Daneliuk <info@tundraware.com>
Newsgroups	comp.lang.python
Subject	Re: Coming In Python 3.15: Sentinel Values
Date	Mon, 11 May 2026 19:51:21 -0500
Organization	A noiseless patient Spider
Lines	20
Message-ID	<95aadm-t721.ln1@oceanview.tundraware.com> (permalink)
References	<10tr770$omms$1@dont-email.me>
MIME-Version	1.0
Content-Type	text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding	8bit
Injection-Date	Tue, 12 May 2026 01:01:02 +0000 (UTC)
Injection-Info	tundraware.eternal-september.org; logging-data="1661774"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18uMfDQnKC1g7q7MWVpdNnVt+VJdYylQDA="; posting-host="dbc718cef053968c72beb73599a85e6d"
User-Agent	Mozilla Thunderbird
Cancel-Lock	sha1:vP2IbLaYISggSJ6nI2zskv8Qn9U= sha256:XBaOM7LOBja0PkpPCCiMFb7G+0wB433tDtF4SBkOWm4= sha1:ZM6H0MQrerk0NV+AeJu2qrgj0TU=
Content-Language	en-US
In-Reply-To	<10tr770$omms$1@dont-email.me>
Xref	csiph.com comp.lang.python:197779

Show key headers only | View raw

On 5/10/26 19:17, Lawrence D’Oliveiro wrote:
> A new feature coming in Python 3.15 is the “sentinel” class, useful
> for creating custom values to mark the end of sequences of items, that
> kind of thing
> <https://docs.python.org/3.15/library/functions.html#sentinel>,
> <https://peps.python.org/pep-0661/>.
> 
> For those times when a simple “None” marker element is not sufficient,
> this will be very convenient. <SNIP>

Forgive me, but this smells of Feeping Creaturism to solve a not very important question
at the expense crufting up the language and decreasing clarity.

I have seen this happen with every single language I ever used except perhaps,
assembler, C, and Forth.

Oh well, there's an opportunity here for someone to excise the noisy PEPs and
create Python Lite.

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Coming In Python 3.15: Sentinel Values Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-05-11 00:17 +0000
  Re: Coming In Python 3.15: Sentinel Values Paul Rubin <no.email@nospam.invalid> - 2026-05-10 21:01 -0700
    Re: Coming In Python 3.15: Sentinel Values Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-05-11 06:24 +0000
      Re: Coming In Python 3.15: Sentinel Values Jon Ribbens <jon+usenet@unequivocal.eu> - 2026-05-11 07:13 +0000
  Re: Coming In Python 3.15: Sentinel Values Tim Daneliuk <info@tundraware.com> - 2026-05-11 19:51 -0500
    Re: Coming In Python 3.15: Sentinel Values Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-05-12 02:42 +0000
      Re: Coming In Python 3.15: Sentinel Values Tim Daneliuk <info@tundraware.com> - 2026-05-12 09:52 -0500
    Re: Coming In Python 3.15: Sentinel Values Paul Rubin <no.email@nospam.invalid> - 2026-05-12 01:03 -0700
      Re: Coming In Python 3.15: Sentinel Values Tim Daneliuk <info@tundraware.com> - 2026-05-12 09:54 -0500

csiph-web