Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #80657
| Path | csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail |
|---|---|
| From | Marko Rauhamaa <marko@pacujo.net> |
| Newsgroups | comp.lang.python |
| Subject | Re: I love assert |
| Date | Thu, 13 Nov 2014 01:12:44 +0200 |
| Organization | A noiseless patient Spider |
| Lines | 27 |
| Message-ID | <87d28sovwz.fsf@elektro.pacujo.net> (permalink) |
| References | <96c138e4-ab95-4e5f-a0c8-e696b5a926bb@googlegroups.com> <cf68f3b4-3312-4dda-a224-8f30f7b31b55@googlegroups.com> <87a93wqeq3.fsf@elektro.pacujo.net> <mailman.15744.1415829173.18130.python-list@python.org> <87y4rgozgd.fsf@elektro.pacujo.net> <CALwzid=77xgqFS6hA4nW5Qvo0Qw2oUjWGAvxdeVzcVG=7DB+Yg@mail.gmail.com> <mailman.15747.1415830087.18130.python-list@python.org> <87lhngox30.fsf@elektro.pacujo.net> <mailman.15756.1415833594.18130.python-list@python.org> |
| Mime-Version | 1.0 |
| Content-Type | text/plain |
| Injection-Info | mx02.eternal-september.org; posting-host="ff5cf27ef3d5b31f034d3b72bdc27a41"; logging-data="15641"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19Xnv45JBLEa7G6yuej2Eop" |
| User-Agent | Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
| Cancel-Lock | sha1:Z0M4L8ovGsYYp6g0K3e/kUNdENc= sha1:cBWD2lRbu9hDXOSJXkutrqqhv5Y= |
| Xref | csiph.com comp.lang.python:80657 |
Show key headers only | View raw
Ian Kelly <ian.g.kelly@gmail.com>:
> On Wed, Nov 12, 2014 at 3:47 PM, Marko Rauhamaa <marko@pacujo.net> wrote:
>> Asserts have nothing to do with them being optimized out. Asserts are
>> communication.
>>
>> Apart from idiomatic style, there is no difference between
>>
>> # never reached
>>
>> assert False
>>
>> raise RuntimeError('Unreachable code reached')
>
> If the purpose is communication, then the comment is most effective,
> as it can easily convey anything you want. If the purpose is to detect
> programming errors, then the RuntimeError is most effective, as it
> will always raise an error in the event it is reached.
>
> assert False is a strange hybrid of the two that is less effective at
> both purposes.
If assert weren't there, I would likely choose one of those two
alternatives. But assert is there so there's no reason to avoid it.
Marko
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
I love assert Peter Cacioppi <peter.cacioppi@gmail.com> - 2014-11-11 11:40 -0800
Re: I love assert Ben Finney <ben+python@benfinney.id.au> - 2014-11-12 07:03 +1100
Re: I love assert Grant Edwards <invalid@invalid.invalid> - 2014-11-11 21:43 +0000
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-11 12:08 -0800
Re: I love assert Rob Gaddi <rgaddi@technologyhighland.invalid> - 2014-11-11 12:20 -0800
Re: I love assert Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-11-11 20:34 +0000
Re: I love assert TP <wingusr@gmail.com> - 2014-11-11 12:57 -0800
Re: I love assert Terry Reedy <tjreedy@udel.edu> - 2014-11-11 17:34 -0500
Re: I love assert Ben Finney <ben+python@benfinney.id.au> - 2014-11-12 09:52 +1100
Re: I love assert Tim Chase <python.list@tim.thechases.com> - 2014-11-11 17:03 -0600
Re: I love assert Peter Cacioppi <peter.cacioppi@gmail.com> - 2014-11-11 15:02 -0800
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-11 15:38 -0800
Re: I love assert Dan Stromberg <drsalists@gmail.com> - 2014-11-11 17:56 -0800
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-12 13:21 +1100
Re: I love assert Ben Finney <ben+python@benfinney.id.au> - 2014-11-12 13:35 +1100
Re: I love assert Grant Edwards <invalid@invalid.invalid> - 2014-11-12 14:10 +0000
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-12 13:44 +1100
Re: I love assert wxjmfauth@gmail.com - 2014-11-11 23:14 -0800
Re: I love assert Terry Reedy <tjreedy@udel.edu> - 2014-11-12 03:29 -0500
Re: I love assert Anton <anton.schattenfeld@gmail.com> - 2014-11-12 12:53 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-12 23:41 +0200
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-12 13:52 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-12 23:56 +0200
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 15:04 -0700
Re: I love assert Anton <anschatten@gmail.com> - 2014-11-12 14:13 -0800
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 15:41 -0700
Re: I love assert Anton <anschatten@gmail.com> - 2014-11-12 14:48 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 01:01 +0200
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-15 10:40 +1100
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 02:12 +0200
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-15 12:04 +1100
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 03:30 +0200
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-15 12:48 +1100
Re: I love assert Tim Chase <python.list@tim.thechases.com> - 2014-11-14 20:14 -0600
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-15 13:16 +1100
Re: I love assert albert@spenarnc.xs4all.nl (Albert van der Horst) - 2014-11-29 17:35 +0000
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 16:02 -0700
Re: I love assert Anton <anschatten@gmail.com> - 2014-11-12 15:43 -0800
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-13 10:10 +1100
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 01:23 +0200
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-13 10:27 +1100
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 01:31 +0200
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-12 14:47 -0800
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-14 22:37 +1100
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-14 09:40 -0700
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 15:07 -0700
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 00:47 +0200
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-12 14:56 -0800
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-13 09:58 +1100
Re: I love assert Ian Kelly <ian.g.kelly@gmail.com> - 2014-11-12 16:05 -0700
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 01:12 +0200
Re: I love assert Lie Ryan <lie.1296@gmail.com> - 2014-11-14 01:09 +1100
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-14 22:33 +1100
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-14 10:18 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-14 21:12 +0200
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-14 12:41 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-14 22:50 +0200
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-15 13:58 +1100
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-14 20:09 -0800
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-17 13:09 +1100
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-16 19:25 -0800
Re: I love assert Anton <anschatten@gmail.com> - 2014-11-12 14:00 -0800
Re: I love assert Anton <anschatten@gmail.com> - 2014-11-12 14:04 -0800
Re: I love assert Marko Rauhamaa <marko@pacujo.net> - 2014-11-13 00:34 +0200
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-13 09:43 +1100
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-14 22:15 +1100
Re: I love assert Richard Riehle <rriehle@itu.edu> - 2014-11-14 14:09 -0800
Decorators (was: Re: I love assert) Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 00:18 +0200
Re: Decorators Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-11-14 22:37 +0000
Re: Decorators Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 00:47 +0200
Re: Decorators (was: Re: I love assert) Richard Riehle <rriehle@itu.edu> - 2014-11-14 18:19 -0800
Re: Decorators (was: Re: I love assert) Mayank Tripathi <oquanox@gmail.com> - 2014-11-15 02:36 +0000
Re: Decorators (was: Re: I love assert) Tim Chase <python.list@tim.thechases.com> - 2014-11-14 20:30 -0600
Re: Decorators Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 09:00 +0200
Re: Decorators Grant Edwards <invalid@invalid.invalid> - 2014-11-15 15:32 +0000
Re: Decorators (was: Re: I love assert) Richard Riehle <rriehle@itu.edu> - 2014-11-14 23:42 -0800
Re: Decorators Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-11-15 13:12 +0000
Re: Decorators Marko Rauhamaa <marko@pacujo.net> - 2014-11-15 15:24 +0200
Re: Decorators Terry Reedy <tjreedy@udel.edu> - 2014-11-15 15:28 -0500
Re: Decorators (was: Re: I love assert) Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-16 02:39 +1100
Re: I love assert TP <wingusr@gmail.com> - 2014-11-27 01:22 -0800
Re: I love assert alister <alister.nospam.ware@ntlworld.com> - 2014-11-27 09:59 +0000
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-29 12:30 +1100
Re: I love assert MRAB <python@mrabarnett.plus.com> - 2014-11-29 02:56 +0000
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-29 20:31 +1100
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-29 21:40 +1100
Re: I love assert MRAB <python@mrabarnett.plus.com> - 2014-11-29 19:49 +0000
Re: I love assert Chris Angelico <rosuav@gmail.com> - 2014-11-29 14:02 +1100
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-29 14:33 -0800
Re: I love assert Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-30 19:18 +1100
Re: I love assert Ethan Furman <ethan@stoneleaf.us> - 2014-11-30 11:34 -0800
csiph-web