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Groups > comp.lang.python > #110975
| From | Ethan Furman <ethan@stoneleaf.us> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Namespaces are one honking great idea |
| Date | 2016-07-02 22:14 -0700 |
| Message-ID | <mailman.34.1467522873.2295.python-list@python.org> (permalink) |
| References | (8 earlier) <1467435593.1705568.654776673.4D901A33@webmail.messagingengine.com> <CAKF=+dhApO5w_wzXgnUwzr+V5-NXOLas_Mjf3Yr7jm9VSoFfzA@mail.gmail.com> <mailman.27.1467473666.2295.python-list@python.org> <57788a2f$0$22141$c3e8da3$5496439d@news.astraweb.com> <57789F3D.7000809@stoneleaf.us> |
On 07/02/2016 08:44 PM, Steven D'Aprano wrote:
> Try getting this behaviour from within a class:
>
>
> class Food(metaclass=Namespace):
>
> # (1) no special decorators required
> def spam(n):
> return ' '.join(['spam']*n)
>
> # (2) can call functions from inside the namespace
> breakfast = spam(5)
>
> # (3) no "cls" or "self" argument
> def lunch():
> # (4) can access variables using their undotted name
> return breakfast + ' and eggs'
>
> def supper():
> # (5) likewise functions (a special case of #4)
> return lunch() + ' and a fried slice of spam'
>
> def mutate(n):
> # global inside the namespace refers to the namespace,
> # not the surrounding module
> global breakfast
> breakfast = spam(5)
> Can you do all of that with an ordinary class?
You can get #2 already, but not the rest (without your spiffy code ;) :
Python 3.5.1+ (3.5:f840608f79da, Apr 14 2016, 12:29:06)
[GCC 4.8.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> class Huh:
... def blah(text):
... print('blah blah %s blah blah blah' % text)
... blah('whatever')
...
blah blah whatever blah blah blah
--
~Ethan~
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Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 00:13 +1000
Re: Namespaces are one honking great idea Random832 <random832@fastmail.com> - 2016-07-01 10:40 -0400
Re: Namespaces are one honking great idea BartC <bc@freeuk.com> - 2016-07-01 15:49 +0100
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-02 03:13 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 03:46 +1000
Re: Namespaces are one honking great idea Rustom Mody <rustompmody@gmail.com> - 2016-07-01 19:26 -0700
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-01 09:00 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 03:10 +1000
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-01 12:29 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-02 11:07 +1000
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-02 01:50 +0000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-01 19:55 -0700
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-03 13:22 +1000
Re: Namespaces are one honking great idea Random832 <random832@fastmail.com> - 2016-07-02 00:59 -0400
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-02 15:34 +0000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-03 13:44 +1000
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-02 22:14 -0700
Re: Namespaces are one honking great idea Kevin Conway <kevinjacobconway@gmail.com> - 2016-07-03 22:02 +0000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-03 16:21 -0700
Re: Namespaces are one honking great idea BartC <bc@freeuk.com> - 2016-07-04 01:19 +0100
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-03 21:01 -0700
Re: Namespaces are one honking great idea Ethan Furman <ethan@stoneleaf.us> - 2016-07-02 16:28 -0700
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-04 21:37 +1000
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-04 15:09 -0700
Re: Namespaces are one honking great idea Lawrence D’Oliveiro <lawrencedo99@gmail.com> - 2016-07-04 15:11 -0700
Re: Namespaces are one honking great idea jmp <jeanmichel@sequans.com> - 2016-07-04 17:58 +0200
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-05 12:58 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-05 13:35 +1000
Re: Namespaces are one honking great idea Chris Angelico <rosuav@gmail.com> - 2016-07-05 13:47 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-07-05 16:09 +1000
A nestedmodule decorator (Re: Namespaces are one honking great idea) Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-05 21:10 +1200
Improved nestedmodule decorator implementation Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-07-05 21:31 +1200
Re: Improved nestedmodule decorator implementation Steven D'Aprano <steve@pearwood.info> - 2016-07-05 20:54 +1000
Re: Namespaces are one honking great idea Steven D'Aprano <steve@pearwood.info> - 2016-07-05 12:34 +1000
Re: Namespaces are one honking great idea jmp <jeanmichel@sequans.com> - 2016-07-04 13:23 +0200
Re: Namespaces are one honking great idea carlosjosepita@gmail.com - 2016-07-09 07:05 -0700
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