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Groups > comp.lang.python > #105787 > unrolled thread
| Started by | beliavsky@aol.com |
|---|---|
| First post | 2016-03-26 15:12 -0700 |
| Last post | 2016-03-30 17:52 +0200 |
| Articles | 1 on this page of 21 — 14 participants |
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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
Page 2 of 2 — ← Prev page 1 [2]
| From | Peter Otten <__peter__@web.de> |
|---|---|
| Date | 2016-03-30 17:52 +0200 |
| Message-ID | <mailman.213.1459353139.28225.python-list@python.org> |
| In reply to | #105899 |
Michael Selik wrote:
> 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']
If you want to make this completely lazy:
>>> from functools import partial
>>> from itertools import repeat, chain
>>> items = list("abc")
>>> list(chain.from_iterable(map(partial(repeat, times=3), items)))
['a', 'a', 'a', 'b', 'b', 'b', 'c', 'c', 'c']
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