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Groups > comp.lang.python > #99527
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| From | Ben Finney <ben+python@benfinney.id.au> |
| Newsgroups | comp.lang.python |
| Subject | Semantics of collection types (was: Late-binding of function defaults (was Re: What is a function parameter =[] for?)) |
| Date | Thu, 26 Nov 2015 16:04:39 +1100 |
| Lines | 39 |
| Message-ID | <mailman.113.1448514292.20593.python-list@python.org> (permalink) |
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Ian Kelly <ian.g.kelly@gmail.com> writes: > On Wed, Nov 25, 2015 at 5:52 PM, Random832 <random832@fastmail.com> wrote: > > On 2015-11-25, Ben Finney <ben+python@benfinney.id.au> wrote: > >> That is, the ‘2’ in ‘cartesian_point = (2, 3)’ means something > >> different than in ‘cartesian_point = (3, 2)’. > >> > >> Whereas the ‘2’ in ‘test_scores = [2, 3]’ means exactly the same as > >> in ‘test_scores = [3, 2]’. > >> > >> If each position in the sequence gives the value there a different > >> menaning, use a tuple; if not, use a list. > > > > I don't think that's really right. I was expanding on (by replying to) earlier advice about expressing semantics in our choice of data types. > > The difference between a tuple and a list is that one is mutable > > and the other is not. That is a difference enforced in the behaviour of the types, yes. I didn't talk about behaviour, but about meaning. I'm saying that the behavioural difference conveniently lines up with a semantic difference, even to the point of the meaning of “tuple” that pre-dates Python. > I think that Ben was actually trying to make a distinction between > heterogeneity and homogeneity of the contents, not a distinction of > whether the collection was ordered or not. That's right, thank you. -- \ “Nothing exists except atoms and empty space; everything else | `\ is opinion.” —Democritus, c. 460 BCE – 370 BCE | _o__) | Ben Finney
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Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Laura Creighton <lac@openend.se> - 2015-11-19 21:18 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-19 22:57 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Laura Creighton <lac@openend.se> - 2015-11-19 23:41 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-20 14:00 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-20 11:33 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-25 09:14 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-25 21:52 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-25 13:25 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 13:20 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ned Batchelder <ned@nedbatchelder.com> - 2015-11-25 07:13 -0800
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Laura Creighton <lac@openend.se> - 2015-11-25 16:59 +0100
Multiplication [was Re: Late-binding of function defaults] Steven D'Aprano <steve@pearwood.info> - 2015-11-26 05:09 +1100
Re: Multiplication [was Re: Late-binding of function defaults] Laura Creighton <lac@openend.se> - 2015-11-25 19:45 +0100
Re: Multiplication [was Re: Late-binding of function defaults] Marko Rauhamaa <marko@pacujo.net> - 2015-11-25 23:04 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Arie van Wingerden <xapwing@gmail.com> - 2015-11-25 17:12 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 03:29 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 17:18 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-25 11:03 -0700
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 18:48 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-11-25 20:50 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 21:56 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 00:16 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 22:41 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-26 11:31 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-26 01:23 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ned Batchelder <ned@nedbatchelder.com> - 2015-11-25 17:52 -0800
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ben Finney <ben+python@benfinney.id.au> - 2015-11-26 16:08 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-11-26 06:39 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-26 09:31 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-26 12:53 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-27 00:15 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-26 14:40 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) MRAB <python@mrabarnett.plus.com> - 2015-11-26 16:14 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-26 22:27 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-27 10:07 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Random832 <random832@fastmail.com> - 2015-11-26 19:15 -0500
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-27 11:48 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) MRAB <python@mrabarnett.plus.com> - 2015-11-27 01:15 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) MRAB <python@mrabarnett.plus.com> - 2015-11-26 16:16 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-11-27 10:48 +1300
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-27 12:46 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-27 02:01 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 08:41 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-27 12:09 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-27 10:31 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-27 13:30 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ben Finney <ben+python@benfinney.id.au> - 2015-11-26 06:57 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-25 23:00 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Emile van Sebille <emile@fenx.com> - 2015-11-25 10:56 -0800
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-26 13:01 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 00:24 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-25 15:17 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Emile van Sebille <emile@fenx.com> - 2015-11-25 10:51 -0800
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-25 19:32 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-25 10:43 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-25 21:58 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 12:35 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-25 15:06 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 13:37 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-25 15:53 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) BartC <bc@freeuk.com> - 2015-11-25 14:34 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-11-25 13:32 -0500
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-26 11:53 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 08:52 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 18:14 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 10:27 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 19:34 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 12:54 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 22:04 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 13:23 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 22:35 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 14:03 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-27 12:43 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-26 09:45 +0100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2015-11-27 10:20 +1300
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Marko Rauhamaa <marko@pacujo.net> - 2015-11-26 23:36 +0200
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Steven D'Aprano <steve@pearwood.info> - 2015-11-27 12:23 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-11-26 11:17 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 00:44 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ben Finney <ben+python@benfinney.id.au> - 2015-11-26 06:55 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Random832 <random832@fastmail.com> - 2015-11-26 00:52 +0000
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Ian Kelly <ian.g.kelly@gmail.com> - 2015-11-25 20:01 -0700
Semantics of collection types (was: Late-binding of function defaults (was Re: What is a function parameter =[] for?)) Ben Finney <ben+python@benfinney.id.au> - 2015-11-26 16:04 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Chris Angelico <rosuav@gmail.com> - 2015-11-26 00:35 +1100
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Larry Hudson <orgnut@yahoo.com> - 2015-11-25 22:44 -0800
Re: Late-binding of function defaults (was Re: What is a function parameter =[] for?) Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2015-11-25 10:13 +0100
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