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Re: Case Statements

From Antoon Pardon <antoon.pardon@rece.vub.ac.be>
Newsgroups comp.lang.python
Subject Re: Case Statements
Date 2016-03-17 09:36 +0100
Message-ID <mailman.262.1458203805.12893.python-list@python.org> (permalink)
References (12 earlier) <ncc4tb$6kj$1@ger.gmane.org> <56E9A66E.4030905@rece.vub.ac.be> <mailman.253.1458170061.12893.python-list@python.org> <56e9f7f9$0$1597$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmpZD6ZKFx7VEAZUJreZp8MuNkuv19Py255X-hPBLA2tPA@mail.gmail.com>

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Op 17-03-16 om 01:31 schreef Chris Angelico:
> On Thu, Mar 17, 2016 at 11:19 AM, Steven D'Aprano <steve@pearwood.info> wrote:
>> On Thu, 17 Mar 2016 10:14 am, Chris Angelico wrote:
>>
>>> On Thu, Mar 17, 2016 at 5:31 AM, Antoon Pardon
>>> <antoon.pardon@rece.vub.ac.be> wrote:
>>>> It can be yes. Look at decorators. They don't provide functionality
>>>> we wouldn't have without them.
>>> Really? Okay, try implementing this without decorators:
>> [...]
>>> @monkeypatch
>>> class Foo:
>> [...]
>>
>>
>> I think Antoon is referring to decorator *syntax*, not the concept of
>> decorators in general. Decorator syntax is just syntactic sugar for:
>>
>>
>> class Foo:
>>     ...
>>
>> Foo = monkeypatch(Foo)
>>
>> which has been valid all the way back to Python 1.0.
>>
> Yes... in theory. But try rewriting my example to avoid decorator
> syntax. It won't work, because of this line:
>
>     orig = globals()[cls.__name__]
>
> It depends on the decorator being run before the name actually gets
> bound - which means the previous class is available to the decorator.
> You can't do that without decorator syntax, or messing around with
> multiple names.

So? That is an implementation detail. With a new features, functionality
can now be accessible in a way it was not before the feature. It still doesn't
add new functionality, which in this case was just transferring methods from
one class to an other.

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Case Statements jj0gen0info@gmail.com - 2016-03-15 13:46 -0700
  Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-15 23:11 +0000
  Re: Case Statements jj0gen0info@gmail.com - 2016-03-15 16:47 -0700
    Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-15 23:58 +0000
    Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 00:51 +0000
      Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 01:05 +0000
  Re: Case Statements jj0gen0info@gmail.com - 2016-03-15 18:55 -0700
    Re: Case Statements "Mario R. Osorio" <nimbiotics@gmail.com> - 2016-03-15 21:06 -0700
      Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 10:34 +0000
        Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-16 23:56 +1100
    Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 04:26 +0000
      Re: Case Statements Christian Gollwitzer <auriocus@gmx.de> - 2016-03-16 09:13 +0100
        Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 08:47 +0000
        Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 11:16 +0200
        Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 10:35 +0100
        Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 09:51 +0000
          Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 19:41 +0000
            Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 22:30 +0000
        Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 11:52 +0100
        Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 11:07 +0000
          Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 11:16 +0000
            Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 11:33 +0000
            Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 14:21 +0200
              Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 12:53 +0000
                Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 16:31 +0200
                Re: Case Statements BartC <bc@freeuk.com> - 2016-03-16 15:00 +0000
                Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 19:07 +0200
              Re: Case Statements Rustom Mody <rustompmody@gmail.com> - 2016-03-20 01:01 -0700
                Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-20 08:29 +0000
        Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-16 14:38 +0100
        Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 14:02 +0000
        Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 21:27 +0200
          Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:22 +0100
            Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-17 10:57 +0200
              Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 10:12 +0100
        Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 11:19 +1100
          Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 12:54 +1100
            Re: Case Statements Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-03-17 18:45 +1300
              Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 17:30 +1100
                Re: Case Statements Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2016-03-18 18:59 +1300
              Re: Case Statements Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2016-03-17 17:29 +1100
                Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 17:48 +1100
                Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 21:53 +1100
                Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 22:49 +1100
            Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 10:23 +0100
            Re: Case Statements Chris Angelico <rosuav@gmail.com> - 2016-03-17 20:55 +1100
          Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:36 +0100
        Re: Case Statements Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2016-03-17 09:38 +0100
  Re: Case Statements l0r0m0a0i0l@gmail.com - 2016-03-16 06:15 -0700
    Re: Case Statements Steven D'Aprano <steve@pearwood.info> - 2016-03-17 00:27 +1100
      Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 14:00 +0000
    Re: Case Statements Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-16 13:59 +0000
  Re: Case Statements l0r0m0a0i0l@gmail.com - 2016-03-16 07:21 -0700
    Re: Case Statements Marko Rauhamaa <marko@pacujo.net> - 2016-03-16 16:33 +0200

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