Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #57946
| Path | csiph.com!usenet.pasdenom.info!aioe.org!news.stack.nl!newsfeed.xs4all.nl!newsfeed3.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail |
|---|---|
| Return-Path | <python.list@tim.thechases.com> |
| X-Original-To | python-list@python.org |
| Delivered-To | python-list@mail.python.org |
| X-Spam-Status | OK 0.013 |
| X-Spam-Evidence | '*H*': 0.97; '*S*': 0.00; 'mrab': 0.05; 'cherrypy': 0.09; 'subject:skip:c 10': 0.09; 'subtle': 0.09; 'def': 0.12; '-tkc': 0.16; 'from:addr:python.list': 0.16; 'from:addr:tim.thechases.com': 0.16; 'from:name:tim chase': 0.16; 'lambda': 0.16; 'fix': 0.17; 'wrote:': 0.18; 'decorators': 0.24; 'cc:2**0': 0.24; 'cc:no real name:2**0': 0.24; 'pass': 0.26; 'header:In-Reply-To:1': 0.27; 'that.': 0.31; 'apparently': 0.31; 'not.': 0.33; "i'd": 0.34; 'case,': 0.35; 'but': 0.35; 'charset :us-ascii': 0.36; 'thanks': 0.36; 'to:addr:python-list': 0.38; 'to:addr:python.org': 0.39; 'either': 0.39; 'making': 0.63; 'happen': 0.63; 'helping': 0.70; 'difference.': 0.84; 'received:50.22': 0.84 |
| Date | Tue, 29 Oct 2013 12:54:05 -0500 |
| From | Tim Chase <python.list@tim.thechases.com> |
| To | python-list@python.org |
| Subject | Re: stacked decorators and consolidating |
| In-Reply-To | <526FF395.9040306@mrabarnett.plus.com> |
| References | <20131029115427.537e1bcd@bigbox.christie.dr> <526FF395.9040306@mrabarnett.plus.com> |
| X-Mailer | Claws Mail 3.8.1 (GTK+ 2.24.10; x86_64-pc-linux-gnu) |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset=US-ASCII |
| Content-Transfer-Encoding | 7bit |
| X-AntiAbuse | This header was added to track abuse, please include it with any abuse report |
| X-AntiAbuse | Primary Hostname - boston.accountservergroup.com |
| X-AntiAbuse | Original Domain - python.org |
| X-AntiAbuse | Originator/Caller UID/GID - [47 12] / [47 12] |
| X-AntiAbuse | Sender Address Domain - tim.thechases.com |
| X-Get-Message-Sender-Via | boston.accountservergroup.com: authenticated_id: tim@thechases.com |
| X-BeenThere | python-list@python.org |
| X-Mailman-Version | 2.1.15 |
| Precedence | list |
| List-Id | General discussion list for the Python programming language <python-list.python.org> |
| List-Unsubscribe | <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe> |
| List-Archive | <http://mail.python.org/pipermail/python-list/> |
| List-Post | <mailto:python-list@python.org> |
| List-Help | <mailto:python-list-request@python.org?subject=help> |
| List-Subscribe | <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.1769.1383069148.18130.python-list@python.org> (permalink) |
| Lines | 27 |
| NNTP-Posting-Host | 2001:888:2000:d::a6 |
| X-Trace | 1383069148 news.xs4all.nl 15975 [2001:888:2000:d::a6]:49636 |
| X-Complaints-To | abuse@xs4all.nl |
| Xref | csiph.com comp.lang.python:57946 |
Show key headers only | View raw
On 2013-10-29 17:42, MRAB wrote: > If you apply the stacked decorators you get: > > myfun = dec1(args1)(dec2(args2)(dec3(args3)(myfun))) > > If you apply dec_all you get: > > myfun = dec1(args1)(dec2(args2)(dec3(args3)))(myfun) > > See the difference? You need the lambda to fix that. In this case, they happen to be CherryPy decorators: @cherrypy.expose() @cherrypy.tools.json_in() @cherrypy.tools.json_out() def myfunc(...): pass I'd have figured they would be associative, making the result end up the same either way, but apparently not. Thanks for helping shed some light on the subtle difference. -tkc
Back to comp.lang.python | Previous | Next — Next in thread | Find similar | Unroll thread
Re: stacked decorators and consolidating Tim Chase <python.list@tim.thechases.com> - 2013-10-29 12:54 -0500 Re: stacked decorators and consolidating Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2013-10-30 11:46 +1300
csiph-web