Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #109703
| From | Antoon Pardon <antoon.pardon@rece.vub.ac.be> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: I'm wrong or Will we fix the ducks limp? |
| Date | 2016-06-09 09:30 +0200 |
| Message-ID | <mailman.92.1465457475.2306.python-list@python.org> (permalink) |
| References | (17 earlier) <nj93dn$pf1$1@dont-email.me> <5758292E.2020600@rece.vub.ac.be> <mailman.80.1465395544.2306.python-list@python.org> <871t474ox1.fsf@elektro.pacujo.net> <57591B21.7050509@rece.vub.ac.be> |
Op 08-06-16 om 18:37 schreef Marko Rauhamaa: > Antoon Pardon <antoon.pardon@rece.vub.ac.be>: > >> You can do something like that in simula, but only because >> simula has two kinds of assignments. One kind that is >> simular to python and one that is similar to C. >> The one that is similar that python is the reference assignment. > I see Python as doing the exact same thing with variables as C. > > What is different is that in Python, every expression evaluates to a > pointer. Thus, you can only assign pointers to variables. Then you think wrong. Python has no pointers, that is an implementation detail. In python when you have two variables, and you assign one to the other you then have two variables that share an object. In C when you have two variables and you assign one to the other you then have two variable each refering to their own object that are copies of each other. And yes that sharing of variables in python can be simulated by copying pointers in C. Maybe the simularities between variables in python can be made isomorphic with a specific subset of pointer operations in C. The fact is that such an isomorphism would be limited to specific pointer operations and would not extend to how variable generally behave in C. In a rather straight forward environment with classes/structs that have an x and y attribute, the following lines behave differently in C and Python. A.x = 1; A.y = 2; B = A; B.x = 3; B.y = 4; In C the variable A will still be x:1, y:2. In Python the variable A will be x:3, y:4. So no, Python doesn't do the exact same thing with variables as C. -- Antoon Pardon.
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 07:20 -0700
Re: I'm wrong or Will we fix the ducks limp? Paul Rudin <paul.nospam@rudin.co.uk> - 2016-06-03 15:34 +0100
Re: I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 08:04 -0700
Re: I'm wrong or Will we fix the ducks limp? Ian Kelly <ian.g.kelly@gmail.com> - 2016-06-03 09:35 -0600
Re: I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 08:50 -0700
Re: I'm wrong or Will we fix the ducks limp? Michael Selik <michael.selik@gmail.com> - 2016-06-03 16:04 +0000
Re: I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 16:06 -0700
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-04 12:31 +1000
Re: I'm wrong or Will we fix the ducks limp? Christopher Reimer <christopher_reimer@icloud.com> - 2016-06-03 19:50 -0700
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-04 19:12 +1000
Re: I'm wrong or Will we fix the ducks limp? Matt Wheeler <m@funkyhat.org> - 2016-06-03 15:54 +0000
Re: I'm wrong or Will we fix the ducks limp? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-04 20:17 -0700
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-05 16:37 +1000
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-05 11:01 +0300
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-05 13:53 -0400
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-05 22:20 +0300
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-05 17:16 -0400
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 11:13 +0300
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-06 13:08 +1200
Re: I'm wrong or Will we fix the ducks limp? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-05 18:28 -0700
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-05 13:42 -0400
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-05 22:38 +0300
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-06 13:52 +1000
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-06 00:08 -0400
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-07 01:42 +1000
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 17:42 +1200
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-06-07 20:18 +1000
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-07 14:32 +0200
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-08 02:03 +1000
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-08 10:08 +0200
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-07 11:33 -0400
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-08 09:53 +0200
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-06-08 18:47 +1000
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-08 11:41 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-08 11:33 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-08 13:01 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-08 13:34 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-08 16:18 +0200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-08 19:37 +0300
Re: I'm wrong or Will we fix the ducks limp? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-08 19:49 -0700
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 09:30 +0200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 12:19 +0300
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 12:19 +0200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 16:13 +0300
Re: I'm wrong or Will we fix the ducks limp? lists@juliensalort.org (Julien Salort) - 2016-06-09 13:46 +0200
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 14:35 +0200
Re: I'm wrong or Will we fix the ducks limp? Paul Rudin <paul.nospam@rudin.co.uk> - 2016-06-09 11:00 +0100
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 15:56 +0300
Re: I'm wrong or Will we fix the ducks limp? Paul Rudin <paul.nospam@rudin.co.uk> - 2016-06-09 15:09 +0100
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 18:14 +0300
Re: I'm wrong or Will we fix the ducks limp? Paul Rudin <paul.nospam@rudin.co.uk> - 2016-06-09 17:22 +0100
Re: I'm wrong or Will we fix the ducks limp? Paul Rudin <paul.nospam@rudin.co.uk> - 2016-06-09 17:48 +0100
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 22:35 +0300
Re: I'm wrong or Will we fix the ducks limp? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-06-10 08:31 +0300
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-09 14:36 -0400
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-08 18:29 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 09:50 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 10:10 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 11:55 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 11:48 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 13:08 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 13:25 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 14:48 +0200
Re: I'm wrong or Will we fix the ducks limp? Rustom Mody <rustompmody@gmail.com> - 2016-06-08 05:36 -0700
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-06-09 17:36 +1000
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 11:46 +0200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-09 13:03 +0300
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 11:42 +0100
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 11:53 +0100
Re: I'm wrong or Will we fix the ducks limp? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-06-09 13:56 +0300
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 13:19 +0200
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-09 13:17 +0100
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-09 14:59 +0200
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-06 18:37 +1200
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-07 02:19 +1000
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-06 12:57 -0400
Re: I'm wrong or Will we fix the ducks limp? Steven D'Aprano <steve@pearwood.info> - 2016-06-07 04:59 +1000
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-06 17:13 -0400
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-07 00:47 +0300
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 19:03 +1200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-07 10:56 +0300
Re: I'm wrong or Will we fix the ducks limp? Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-06-07 11:41 +0300
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-07 11:49 +0100
Re: I'm wrong or Will we fix the ducks limp? Random832 <random832@fastmail.com> - 2016-06-07 11:14 -0400
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-08 17:59 +1200
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 18:33 +1200
Re: I'm wrong or Will we fix the ducks limp? Chris Angelico <rosuav@gmail.com> - 2016-06-07 16:55 +1000
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-06 22:55 +0100
Re: I'm wrong or Will we fix the ducks limp? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-06-07 18:20 +1200
Re: I'm wrong or Will we fix the ducks limp? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-06-06 11:23 +0200
Re: I'm wrong or Will we fix the ducks limp? Marko Rauhamaa <marko@pacujo.net> - 2016-06-06 13:10 +0300
Re: I'm wrong or Will we fix the ducks limp? Chris Angelico <rosuav@gmail.com> - 2016-06-06 21:57 +1000
Re: I'm wrong or Will we fix the ducks limp? BartC <bc@freeuk.com> - 2016-06-06 13:35 +0100
Re: I'm wrong or Will we fix the ducks limp? Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-06-05 18:25 -0700
Re: I'm wrong or Will we fix the ducks limp? Peter Pearson <pkpearson@nowhere.invalid> - 2016-06-03 16:05 +0000
Re: I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 16:09 -0700
Re: I'm wrong or Will we fix the ducks limp? cs@zip.com.au - 2016-06-06 08:41 +1000
Re: I'm wrong or Will we fix the ducks limp? Nagy László Zsolt <gandalf@shopzeus.com> - 2016-06-03 18:11 +0200
Re: I'm wrong or Will we fix the ducks limp? Sayth Renshaw <flebber.crue@gmail.com> - 2016-06-03 16:11 -0700
Re: I'm wrong or Will we fix the ducks limp? Terry Reedy <tjreedy@udel.edu> - 2016-06-03 22:12 -0400
Re: I'm wrong or Will we fix the ducks limp? jfine2358@gmail.com - 2016-06-06 07:32 -0700
csiph-web