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Groups > comp.lang.python > #49457
| Date | 2013-06-29 14:42 -0500 |
|---|---|
| From | Tim Chase <tim@thechases.com> |
| Subject | Re: Closures in leu of pointers? |
| References | (2 earlier) <bc798729-f935-448d-9d62-c409b2d12e76@googlegroups.com> <51CEE8E9.4070703@gmail.com> <51CF1309.1010504@rece.vub.ac.be> <mailman.4001.1372530961.3114.python-list@python.org> <51cf332f$0$29999$c3e8da3$5496439d@news.astraweb.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.4006.1372534883.3114.python-list@python.org> (permalink) |
On 2013-06-29 19:19, Steven D'Aprano wrote:
> Nobody ever asks why Python doesn't let you sort an int, or take
> the square of a list...
just to be ornery, you can sort an int:
>>> i = 314159265
>>> ''.join(sorted(str(i)))
'112345569'
And I suppose, depending on how you define it, you can square a list:
>>> lst = list('abcd')
>>> import itertools
>>> list(itertools.product(lst, lst))
[('a', 'a'), ('a', 'b'), ('a', 'c'), ('a', 'd'), ('b', 'a'), ('b',
'b'), ('b', 'c'), ('b', 'd'), ('c', 'a'), ('c', 'b'), ('c', 'c'),
('c', 'd'), ('d', 'a'), ('d', 'b'), ('d', 'c'), ('d', 'd')]
Or, if you want to do it frequently, Python graciously even allows
you to do things like
>>> class MultiList(list):
... def __pow__(self, power):
... return list(itertools.product(*([self] * power)))
...
>>> lst = MultiList("abcd")
>>> lst ** 2
[('a', 'a'), ('a', 'b'), ('a', 'c'), ('a', 'd'), ('b', 'a'), ('b',
'b'), ('b', 'c'), ('b', 'd'), ('c', 'a'), ('c', 'b'), ('c', 'c'),
('c', 'd'), ('d', 'a'), ('d', 'b'), ('d', 'c'), ('d', 'd')]
:-)
-tkc
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Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 02:34 -0700
Re: Closures in leu of pointers? Fábio Santos <fabiosantosart@gmail.com> - 2013-06-29 10:42 +0100
Re: Closures in leu of pointers? Peter Otten <__peter__@web.de> - 2013-06-29 12:01 +0200
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 04:21 -0700
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 04:44 -0700
Re: Closures in leu of pointers? Peter Otten <__peter__@web.de> - 2013-06-29 14:12 +0200
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 05:26 -0700
Re: Closures in leu of pointers? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-06-29 15:37 +0100
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 07:48 -0700
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 07:56 -0600
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:36 -0600
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 08:02 -0600
Re: Closures in leu of pointers? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-06-29 19:02 +0200
Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-29 10:33 -0700
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 11:37 -0700
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:58 -0600
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:59 +0000
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:51 +0000
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 13:04 -0600
Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-29 12:11 -0700
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 12:35 -0600
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:19 +0000
Re: Closures in leu of pointers? Tim Chase <tim@thechases.com> - 2013-06-29 14:42 -0500
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-30 01:41 +0000
Re: Closures in leu of pointers? Joshua Landau <joshua.landau.ws@gmail.com> - 2013-06-29 21:02 +0100
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 16:02 -0600
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 18:45 +0000
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:00 +0000
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 12:20 -0700
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-29 19:33 +0000
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 12:34 -0700
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 13:47 -0600
Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-29 16:53 -0400
Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 01:56 -0700
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-06-30 11:22 +0000
Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 04:42 -0700
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 15:21 -0600
Re: Closures in leu of pointers? cts.private.yahoo@gmail.com - 2013-06-29 14:30 -0700
Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-30 00:32 -0400
Re: Closures in leu of pointers? Chris Angelico <rosuav@gmail.com> - 2013-06-30 15:08 +1000
Re: Closures in leu of pointers? rusi <rustompmody@gmail.com> - 2013-06-30 00:36 -0700
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 23:46 -0600
Re: Closures in leu of pointers? alex23 <wuwei23@gmail.com> - 2013-07-01 14:57 +1000
Re: Closures in leu of pointers? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-01 07:36 +0000
Re: Closures in leu of pointers? Chris Angelico <rosuav@gmail.com> - 2013-06-30 15:59 +1000
Re: Closures in leu of pointers? Terry Reedy <tjreedy@udel.edu> - 2013-06-30 02:11 -0400
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 00:24 -0600
Re: Closures in leu of pointers? Michael Torrie <torriem@gmail.com> - 2013-06-29 16:03 -0600
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-29 13:23 -0600
Re: Closures in leu of pointers? Antoon Pardon <antoon.pardon@rece.vub.ac.be> - 2013-06-30 12:07 +0200
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 11:13 -0600
Re: Closures in leu of pointers? Ian Kelly <ian.g.kelly@gmail.com> - 2013-06-30 11:18 -0600
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