Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail
Return-Path: <szabolcs.blaga@gmail.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.000
X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'else:': 0.03; 'received:209.85.223': 0.03; 'syntax': 0.03; 'calls.': 0.07; '40,': 0.09; 'positional': 0.09; 'useless': 0.09; 'def': 0.10; '"..."': 0.16; '...,': 0.16; '36,': 0.16; '37,': 0.16; '39,': 0.16; '42,': 0.16; 'argument.': 0.16; 'ellipsis': 0.16; 'syntactic': 0.16; 'all,': 0.21; 'example': 0.23; 'idea': 0.24; 'message-id:@mail.gmail.com': 0.27; 'subject:list': 0.28; 'skip:& 10': 0.29; 'function': 0.30; 'implement': 0.32; 'could': 0.32; 'to:addr:python-list': 0.33; 'received:google.com': 0.34; 'received:209.85': 0.35; 'but': 0.36; 'should': 0.36; 'turn': 0.36; 'received:209': 0.37; 'subject:: ': 0.38; 'object': 0.38; 'to:addr:python.org': 0.39; 'little': 0.39; 'think': 0.40; 'easy': 0.60; 'relatively': 0.62; 'dear': 0.66
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:mime-version:from:date:message-id:subject:to :content-type; bh=Zp0glKdpN8bdpwvovYfBnFP7M7vtDhS+5aRvzNrnWJw=; b=qIDwnLE5GYHbjGlssLhO08kpXsyVh8CSnKEYwaTmSTKpDraY4bDrta91CX/gtRwfT2 ZvozVhMos8PFHvjXdhkv0/PBomP8LbklWkNEYfG+V02ZpBuD13FsoVb+MPaQaXFCkw1+ lSGOXhv2MLfO9drPiE8NcaXGvUZQCpPW+85EGAy0KDZfNzJp62dTxdWOjXN5iOF2lsQR EbFxXOMUGX0r3oZnRae60t1J1lq8jkn6ErnBK6dUe74/OcI5u+dJ8XKPpA2lqldSY2Jm ZwNatXxzWLfzY54789VkIwPCaUWMeIrmIGIivq8rIGZ+sbTBjeMKfh2UowVIQZiqx3hT 0oZg==
X-Received: by 10.50.220.199 with SMTP id py7mr2179587igc.34.1357997433529; Sat, 12 Jan 2013 05:30:33 -0800 (PST)
MIME-Version: 1.0
From: =?UTF-8?Q?Szabolcs_Bl=C3=A1ga?= <szabolcs.blaga@gmail.com>
Date: Sat, 12 Jan 2013 14:30:03 +0100
Subject: proposal: Ellipsis in argument list
To: python-list@python.org
Content-Type: multipart/alternative; boundary=f46d0434bdd2a1a72f04d3176ab8
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: <http://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: <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.445.1357997442.2939.python-list@python.org>
Lines: 56
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1357997442 news.xs4all.nl 6894 [2001:888:2000:d::a6]:40263
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:36700

--f46d0434bdd2a1a72f04d3176ab8
Content-Type: text/plain; charset=UTF-8

Dear All,

I have an idea that the Ellipsis object could be used in function calls.
The "..." syntax should automagically turn into an Ellipsis positional
argument.

def f(*args):
  ext_args = []
  for i, a in enumerate(args):
    if a is Ellipsis:
      ext_args.extend([x for x in range(args[i-1]-1, args[i+1])])
    else:
      ext_args.append(a)
  return ext_args

Calling it for the above example specifically:

>>>f(34, ..., 43)
[34, 35, 36, 37, 38, 39, 40, 41, 42, 43]

That might be useless or someone might say it is confusing, but I think it
would be relatively easy to implement and a nice little syntactic "sugar".

Best regards,

Szabolcs Blaga

--f46d0434bdd2a1a72f04d3176ab8
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

Dear All,<div><br></div><div>I have an idea that the Ellipsis object could =
be used in function calls. The &quot;...&quot; syntax should automagically =
turn into an Ellipsis positional argument.</div><div><br></div><div>def f(*=
args):</div>

<div>=C2=A0 ext_args =3D []</div><div>=C2=A0 for i, a in enumerate(args):</=
div><div>=C2=A0 =C2=A0 if a is Ellipsis:</div><div>=C2=A0 =C2=A0 =C2=A0 ext=
_args.extend([x for x in range(args[i-1]-1, args[i+1])])</div><div>=C2=A0 =
=C2=A0 else:</div><div>=C2=A0 =C2=A0 =C2=A0 ext_args.append(a)</div>

<div>=C2=A0 return ext_args</div><div><br></div><div>Calling it for the abo=
ve example specifically:</div><div><br></div><div>&gt;&gt;&gt;f(34, ..., 43=
)</div><div>[34, 35, 36, 37, 38, 39, 40, 41, 42, 43]</div><div><br></div><d=
iv>

That might be useless or someone might say it is confusing, but I think it =
would be relatively easy to implement and a nice little syntactic &quot;sug=
ar&quot;.</div><div><br></div><div>Best regards,</div><div><br></div><div>

Szabolcs Blaga</div>

--f46d0434bdd2a1a72f04d3176ab8--