Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #80648
| From | Marko Rauhamaa <marko@pacujo.net> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: I love assert |
| Date | 2014-11-13 00:47 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <87lhngox30.fsf@elektro.pacujo.net> (permalink) |
| References | (2 earlier) <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> |
Ian Kelly <ian.g.kelly@gmail.com>:
> Although to be honest I'd rather use something like "raise
> RuntimeError('Unreachable code reached')" than "assert False" here. If
> the expectation is that the code will never be executed, then there's
> no reason to ever optimize it out.
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')
1 / 0
print("Hello world")
since, after all, that line is never reached!
Out of these variants, I find
assert False
to be the most tasteful. It is concise, to the point and provided by the
core language. If it didn't exist, I'd have to resort to one of the
other alternatives.
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