Path: csiph.com!usenet.pasdenom.info!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed4.news.xs4all.nl!xs4all!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 0.019 X-Spam-Evidence: '*H*': 0.96; '*S*': 0.00; 'else:': 0.03; 'attribute': 0.07; 'none:': 0.07; 'computed': 0.09; 'none)': 0.09; 'thx': 0.09; 'subject:How': 0.10; 'python': 0.11; 'def': 0.12; '@property': 0.16; 'attribute,': 0.16; 'subject:default': 0.16; 'unexpected': 0.16; 'print': 0.22; 'skip:_ 20': 0.27; 'header:In-Reply-To:1': 0.27; 'idea': 0.28; 'subject:that': 0.31; 'another': 0.32; '-----': 0.33; 'skip:_ 10': 0.34; 'maybe': 0.34; 'subject:the': 0.34; 'something': 0.35; 'but': 0.35; 'mass': 0.36; 'subject:one': 0.36; 'should': 0.36; 'changing': 0.37; 'being': 0.38; 'thank': 0.38; 'to:addr:python-list': 0.38; 'issue': 0.38; 'to:addr:python.org': 0.39; 'you.': 0.62; 'information': 0.63; 'received:194': 0.64; 'notice:': 0.67; 'circle': 0.68; 'person,': 0.68; 'privileged.': 0.69; 'disclose': 0.74; 'medium.': 0.91; 'write:': 0.91 X-IronPort-AV: E=Sophos;i="5.07,553,1413237600"; d="scan'208";a="3713951" Date: Wed, 10 Dec 2014 17:10:03 +0100 (CET) From: Jean-Michel Pichavant To: python-list@python.org In-Reply-To: <5488634e$0$2130$426a74cc@news.free.fr> Subject: Re: How to detect that a function argument is the default one MIME-Version: 1.0 X-Mailer: Zimbra 7.2.7_GA_2942 (ZimbraWebClient - GC37 (Linux)/7.2.7_GA_2942) Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 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: 28 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1418227811 news.xs4all.nl 2966 [2001:888:2000:d::a6]:47927 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:82292 LS0tLS0gT3JpZ2luYWwgTWVzc2FnZSAtLS0tLQo+IEZyb206ICJhc3QiIDxub21haWxAaW52YWxp ZC5jb20+Cj4gSSBoYXZlIHRoZSBpZGVhIHRvIHdyaXRlOgo+IAo+IGRlZiBfX2luaXRfXyhjZW50 ZXI9KDAsMCksIHJhZGl1cz0xMCwgbWFzcz1Ob25lKSk6Cj4gCj4gICAgIGlmICBtYXNzID09IE5v bmU6Cj4gICAgICAgICBzZWxmLm1hc3MgPSByYWRpdXMqKjIKPiAgICAgZWxzZToKPiAgICAgICAg IHNlbGYubWFzcyA9IG1hc3MKPiAKPiBidXQgbWF5YmUgUHl0aG9uIHByb3ZpZGVzIHNvbWV0aGlu ZyBjbGV2ZXIuCj4gCj4gVGh4CgpJZiB5b3UgbGlrZSBvbmUtbGluZXJzLAoKZGVmIF9faW5pdF9f KHNlbGYsIGNlbnRlcj0oMCwwKSwgcmFkaXVzPTEwLCBtYXNzPU5vbmUpOgogICAgc2VsZi5jZW50 ZXIgPSBjZW50ZXIKICAgIHNlbGYucmFkaXVzID0gcmFkaXVzCiAgICBzZWxmLm1hc3MgPSAobWFz cyBpcyBOb25lIGFuZCByYWRpdXMqKjIpIG9yIG1hc3MKCkJ1dCB0aGVyZSdzIGFuIGlzc3VlIHdp dGggdGhhdCBzb2x1dGlvbjogc2VsZi5tYXNzIGJlaW5nIGNvbXB1dGVkIGR1cmluZyB0aGUgaW5z dGFuY2UgaW5pdGlhbGl6YXRpb24sIHdoYXQgaWYgcmFkaXVzIGlzIGNoYW5naW5nID8KCmMxID0g Q2lyY2xlKCgwLDApLCAxMCwgTm9uZSkKcHJpbnQgYzEubWFzcwoyMApjMS5yYWRpdXMgPSAyMApw cmludCBjMS5tYXNzCjIwICMgdGhhdCBpcyB1bmV4cGVjdGVkCgpFdmVyeXRpbWUgYW4gYXR0cmli dXRlIGlzIGNvbXB1dGVkIGZyb20gYW5vdGhlciBhdHRyaWJ1dGUsIGl0IHNob3VsZCByaW5nIGEg cHl0aG9uIGJlbGwgOiBwcm9wZXJ0eQoKZGVmIF9faW5pdF9fKHNlbGYsIGNlbnRlciwgcmFkaXVz LCBtYXNzKToKICAgIHNlbGYuY2VudGVyID0gY2VudGVyCiAgICBzZWxmLnJhZGl1cyA9IHJhZGl1 cwogICAgc2VsZi5fbWFzcyA9IG1hc3MKCiAgICBAcHJvcGVydHkKICAgIGRlZiBtYXNzKHNlbGYp OgogICAgICAgICByZXR1cm4gc2VsZi5fbWFzcyBpZiBzZWxmLl9tYXNzIGlzIG5vdCBOb25lIGVs c2Ugc2VsZi5yYWRpdXMqMgoKCmMxID0gQ2lyY2xlKCgwLDApLCAxMCwgTm9uZSkKcHJpbnQgYzEu bWFzcwoyMApjMS5yYWRpdXMgPSAyMApwcmludCBjMS5tYXNzCjQwCgpKTQoKTm90ZSA6IHdoYXQg aXMgdGhlIG1hc3Mgb2YgYSBjaXJjbGUgPwoKCi0tIElNUE9SVEFOVCBOT1RJQ0U6IAoKVGhlIGNv bnRlbnRzIG9mIHRoaXMgZW1haWwgYW5kIGFueSBhdHRhY2htZW50cyBhcmUgY29uZmlkZW50aWFs IGFuZCBtYXkgYWxzbyBiZSBwcml2aWxlZ2VkLiBJZiB5b3UgYXJlIG5vdCB0aGUgaW50ZW5kZWQg cmVjaXBpZW50LCBwbGVhc2Ugbm90aWZ5IHRoZSBzZW5kZXIgaW1tZWRpYXRlbHkgYW5kIGRvIG5v dCBkaXNjbG9zZSB0aGUgY29udGVudHMgdG8gYW55IG90aGVyIHBlcnNvbiwgdXNlIGl0IGZvciBh bnkgcHVycG9zZSwgb3Igc3RvcmUgb3IgY29weSB0aGUgaW5mb3JtYXRpb24gaW4gYW55IG1lZGl1 bS4gVGhhbmsgeW91Lgo=