Path: csiph.com!usenet.pasdenom.info!weretis.net!feeder4.news.weretis.net!dedekind.zen.co.uk!zen.net.uk!hamilton.zen.co.uk!reader01.nrc01.news.zen.net.uk.POSTED!not-for-mail
From: Nobody <nobody@nowhere.com>
Subject: Re: Suggested feature: slice syntax within tuples (or even more generally)?
Date: Tue, 26 Feb 2013 07:38:19 +0000
User-Agent: Pan/0.14.2 (This is not a psychotic episode. It's a cleansing moment of clarity.)
Message-Id: <pan.2013.02.26.07.38.34.183000@nowhere.com>
Newsgroups: comp.lang.python
References: <2e07acfb-4f48-4a27-9b06-3d8103325c0f@googlegroups.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Lines: 23
Organization: Zen Internet
NNTP-Posting-Host: e0d5ca76.news.zen.co.uk
X-Trace: DXC=1QC`KNA^UU`6l^Oa0Ah_Pga0UP_O8AJol=dR0\ckLKG`WeZ<[7LZNRfKc6h^1n0MdfM2Z^cWRFGAkieB1l5<bC5b
X-Complaints-To: abuse@zen.co.uk
Xref: csiph.com comp.lang.python:39936

On Wed, 13 Feb 2013 11:00:15 -0800, stephenwlin wrote:

> Would it be feasible to modify the Python grammar to allow ':' to generate
> slice objects everywhere rather than just indexers and top-level tuples of
> indexers?

If you need to be able to easily construct indexing objects, create a
helper like:

	> class Slicer(object):
	=     def __getitem__(self, s):
	=         return s
	= 
	> s_ = Slicer()
	> s_[1,2,3]
	(1, 2, 3)
	> s_[:]
	slice(None, None, None)
	> s_[1:2:3,4:5:6]
	(slice(1, 2, 3), slice(4, 5, 6))
	> s_[...]
	Ellipsis