Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!us.feeder.erje.net!border1.nntp.ams1.giganews.com!border2.nntp.ams1.giganews.com!nntp.giganews.com!newsfeed.xs4all.nl!newsfeed1.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <rosuav@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.053
X-Spam-Evidence: '*H*': 0.90; '*S*': 0.01; 'true,': 0.05; 'none,': 0.07; 'differently.': 0.09; 'cc:addr:python-list': 0.11; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'literals,': 0.16; 'optional': 0.16; 'subject:parameters': 0.16; 'wrote:': 0.18; 'cc:addr:python.org': 0.22; 'cc:2**0': 0.24; 'header:In-Reply-To:1': 0.27; 'specifically': 0.29; 'chris': 0.29; 'message-id:@mail.gmail.com': 0.30; 'cases': 0.33; 'could': 0.34; "can't": 0.35; 'common': 0.35; 'except': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'false': 0.36; 'pm,': 0.38; 'dave': 0.60; 'such': 0.63; 'evaluate': 0.72; '2015': 0.84; 'optimized,': 0.84; 'absolutely': 0.87; 'angel': 0.91; 'to:none': 0.92
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:cc :content-type; bh=uwwfky1muISgp9zHHJbgx8mwT/DitvM3rEVAgT0zMgU=; b=QGAqjfckIrlv5rbzyYxBEpaj/Au0WdOlMYxQB6vhI0/rzls3K6ogQ/9m4QiJQd1mBC dGwEAiRiVBaJBujC0/4q4aICidYy5A9MuuLR5d8e5k+GB+CnMXhnYkeL4XazV/NT4QAi 9PAOm9rqdasZWgYpMI0UrND3FcMld7Jn0GzlPifZY2FJIXvkI6ihQmCtzme9gTsg3Q7P J0GeOhQZJ8Lh0quScaLAJ29ayj3WvagQlzCYHbYn95oRdA3R648PC1KHZpszOnEXdo90 xRG/qbFKiTR4MxFm6MmuyX6OSMwRUo0lNt/wev0tFxaY92vcLUdpwfnVZ4FVtyAO3rmY ygIA==
MIME-Version: 1.0
X-Received: by 10.43.39.1 with SMTP id tk1mr6874595icb.26.1431268797992; Sun, 10 May 2015 07:39:57 -0700 (PDT)
In-Reply-To: <554F4046.6000101@davea.name>
References: <72lu1cxvmg.ln2@news.c0t0d0s0.de> <554cd511$0$12979$c3e8da3$5496439d@news.astraweb.com> <ui2v1cx5co.ln2@news.c0t0d0s0.de> <554ec664$0$13001$c3e8da3$5496439d@news.astraweb.com> <CAPTjJmq+XKq4SER-Hy-3RK=jAv-rHqNEw9ugJym_yH-d2GwFvQ@mail.gmail.com> <554F4046.6000101@davea.name>
Date: Mon, 11 May 2015 00:39:57 +1000
Subject: Re: functions, optional parameters
From: Chris Angelico <rosuav@gmail.com>
Cc: "python-list@python.org" <python-list@python.org>
Content-Type: text/plain; charset=UTF-8
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.20+
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.309.1431268801.12865.python-list@python.org>
Lines: 15
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1431268801 news.xs4all.nl 2838 [2001:888:2000:d::a6]:52332
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:90288

On Sun, May 10, 2015 at 9:25 PM, Dave Angel <davea@davea.name> wrote:
> On 05/09/2015 11:33 PM, Chris Angelico wrote:
>> What you could have is "late-binding semantics, optional early binding
>> as an optimization but only in cases where the result is
>> indistinguishable". That would allow common cases (int/bool/str/None
>> literals) to be optimized, since there's absolutely no way for them to
>> evaluate differently.
>>
>
> Except for literals, True, False and None, I can't see any way to optimize
> such a thing.

I did specifically say "literals" :)

ChrisA