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Groups > comp.lang.python > #106061
| From | Michael Selik <michael.selik@gmail.com> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: repeat items in a list |
| Date | 2016-03-29 22:05 +0000 |
| Message-ID | <mailman.198.1459342300.28225.python-list@python.org> (permalink) |
| References | (1 earlier) <nd8ag6$6gh$1@gioia.aioe.org> <29bb9c16-eef4-4c00-9e41-ce8419405c29@googlegroups.com> <ndb50q$b8e$2@gioia.aioe.org> <1459173882.380114.561434386.096F166A@webmail.messagingengine.com> <ndersg$394$1@ger.gmane.org> |
I prefer itertools.chain.from_iterable to the sum trick.
>>> from itertools import chain
>>> lst = list('abc')
>>> list(chain.from_iterable([s]*3 for s in lst))
['a', 'a', 'a', 'b', 'b', 'b', 'c', 'c', 'c']
On Tue, Mar 29, 2016 at 5:28 PM Vito De Tullio <vito.detullio@gmail.com>
wrote:
> Random832 wrote:
>
> > How do you turn ['a', 'c', 'b'] into ['a', 'a', 'a', 'c', 'c', 'c', 'b',
> > 'b', 'b']?
>
> >>> sum([[e]*3 for e in ['a', 'c', 'b']], [])
> ['a', 'a', 'a', 'c', 'c', 'c', 'b', 'b', 'b']
>
>
> --
> By ZeD
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>
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repeat items in a list beliavsky@aol.com - 2016-03-26 15:12 -0700
Re: repeat items in a list Cameron Simpson <cs@zip.com.au> - 2016-03-27 10:05 +1100
Re: repeat items in a list Erik <python@lucidity.plus.com> - 2016-03-26 23:23 +0000
Re: repeat items in a list beliavsky@aol.com - 2016-03-26 16:36 -0700
Re: repeat items in a list Rob Gaddi <rgaddi@highlandtechnology.invalid> - 2016-03-28 17:30 +0000
Re: repeat items in a list Chris Angelico <rosuav@gmail.com> - 2016-03-29 08:25 +1100
Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-29 01:43 -0700
Re: repeat items in a list Erik <python@lucidity.plus.com> - 2016-03-28 23:14 +0100
Re: repeat items in a list Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-26 23:28 +0000
Re: repeat items in a list beliavsky@aol.com - 2016-03-26 16:54 -0700
Re: repeat items in a list Paul Rubin <no.email@nospam.invalid> - 2016-03-26 22:35 -0700
Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 01:02 -0700
Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 01:30 -0700
Re: repeat items in a list Jussi Piitulainen <jussi.piitulainen@helsinki.fi> - 2016-03-27 14:09 +0300
Re: repeat items in a list larudwer <larudwer@freenet.de> - 2016-03-27 11:52 +0200
Re: repeat items in a list Antonio Caminero Garcia <tonycamgar@gmail.com> - 2016-03-27 04:13 -0700
Re: repeat items in a list larudwer <larudwer@freenet.de> - 2016-03-28 13:36 +0200
Re: repeat items in a list Random832 <random832@fastmail.com> - 2016-03-28 10:04 -0400
Re: repeat items in a list Vito De Tullio <vito.detullio@gmail.com> - 2016-03-29 23:25 +0200
Re: repeat items in a list Michael Selik <michael.selik@gmail.com> - 2016-03-29 22:05 +0000
Re: repeat items in a list Peter Otten <__peter__@web.de> - 2016-03-30 17:52 +0200
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