Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!feeder2-2.proxad.net!proxad.net!feeder1-2.proxad.net!news.tele.dk!news.tele.dk!small.news.tele.dk!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.022 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'args': 0.07; 'http': 0.09; 'override': 0.09; 'params': 0.09; 'subject:()': 0.09; 'def': 0.12; '24,': 0.16; 'evaluates': 0.16; 'executed.': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'get,': 0.16; 'inclined': 0.16; 'wrote:': 0.18; 'work,': 0.20; 'this:': 0.26; 'post': 0.26; 'skip:" 20': 0.27; 'header:In-Reply- To:1': 0.27; 'message-id:@mail.gmail.com': 0.30; '(maybe': 0.31; 'marc': 0.31; 'request,': 0.31; 'call.': 0.33; 'proceed': 0.33; 'skip:_ 10': 0.34; 'something': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'version': 0.36; 'done': 0.36; 'doing': 0.36; 'method': 0.36; 'nov': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'to:addr:python.org': 0.39; 'then,': 0.60; 'conversion': 0.61; 'simply': 0.61; 'first': 0.61; 'request.': 0.70; 'unusual': 0.74; 'subject:skip:o 10': 0.84; 'difficult,': 0.91; '2013': 0.98 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=2NcZhbwLoNUIQ42/gitxw1UlnFndr16NVA7WQonNioo=; b=bGq0S9XjIsnbIL1a2gKqfycgzYbRFaqI3iFEm6rSdZmqczlBcQYGf/h0LrnT24680e Otysvd4Ax/HCRQqeYIeOLbC514WvivdVuZ+vXUhLj0iwyRtrS8Ozd89o0lgrC/HAZUbq h139fN7D1OSDIivPmUJCBT5lH66FOdMritLCj2dOHxRNWjfU0B0yYep3u+p9rljhXXar edrH4+lMHvuOohmGx7eiQLfAgWD6zoiXeFifBxfvXLwKckfgQqR21j6cUWfEahnE+GqG plsF4ITd1kOwT4SCOcF0YjfcedRgkcW5YoHUVa7jKkqh7EVnpcwYmlfcoAgygSvZSxOF wsTw== MIME-Version: 1.0 X-Received: by 10.66.139.100 with SMTP id qx4mr1002411pab.141.1385298350774; Sun, 24 Nov 2013 05:05:50 -0800 (PST) In-Reply-To: References: Date: Mon, 25 Nov 2013 00:05:50 +1100 Subject: Re: Implement logic on object.attribute and object.attribute() From: Chris Angelico To: python-list@python.org Content-Type: text/plain; charset=ISO-8859-1 X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 23 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1385298360 news.xs4all.nl 15917 [2001:888:2000:d::a6]:50447 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:60365 On Sun, Nov 24, 2013 at 11:52 PM, Marc Aymerich wrote: > if I access to "object.attribute" I want to return the result of an > HTTP GET request. However if i call "object.attribute()" I want an > HTTP POST request to be executed. That's fundamentally difficult, because object.attribute() first evaluates object.attribute, then calls it. The only way you can have that work, then, is if you have one version (calling it) do the POST call, and something else (maybe conversion to str?) do the GET call. But it's not going to be easy. I would recommend having both of them done with a call; since a POST request will almost always include a request body and a GET request almost never, I would be inclined to a model like this: def __call__(self, METHOD=None, **params): METHOD = method or ('POST' if params else 'GET') # proceed to use the given method This way, you simply call it with no args for a GET, or with form fill-out args for POST, and you can override if you want to (eg for a PUT request, or doing something unusual like POST without data). ChrisA