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Re: Exclude every nth element from list?

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Le 26/03/2016 18:06, Vincent Vande Vyvre a écrit :
> Le 26/03/2016 17:49, beliavsky--- via Python-list a écrit :
>> I can use x[::n] to select every nth element of a list. Is there a 
>> one-liner to get a list that excludes every nth element?
> Something like that:
>
> >>> l = list("lkodjuyhrtgfedcvfg")
> >>> l
> ['l', 'k', 'o', 'd', 'j', 'u', 'y', 'h', 'r', 't', 'g', 'f', 'e', 'd', 
> 'c', 'v', 'f', 'g']
> >>> ll = [c for i, c in enumerate(l) if i % 3]
> >>> ll.insert(0, l[0])
> >>> ll
> ['l', 'k', 'o', 'j', 'u', 'h', 'r', 'g', 'f', 'd', 'c', 'f', 'g']
>
>
>
> Vincent
Correction, it's more correct with the insert before the list comprehension

 >>> l.insert(0, "_")
 >>> ll = [c for i, c in enumerate(l) if i % 3]
 >>> ll
['l', 'k', 'd', 'j', 'y', 'h', 't', 'g', 'e', 'd', 'v', 'f']

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Exclude every nth element from list? beliavsky@aol.com - 2016-03-26 09:49 -0700
  Re: Exclude every nth element from list? Gary Herron <gherron@digipen.edu> - 2016-03-26 10:01 -0700
    Re: Exclude every nth element from list? beliavsky@aol.com - 2016-03-26 15:08 -0700
      Re: Exclude every nth element from list? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2016-03-26 22:57 +0000
  Re: Exclude every nth element from list? Bob Gailer <bgailer@gmail.com> - 2016-03-26 13:03 -0400
  Re: Exclude every nth element from list? Erik <python@lucidity.plus.com> - 2016-03-26 17:06 +0000
  Re: Exclude every nth element from list? Vincent Vande Vyvre <vincent.vande.vyvre@telenet.be> - 2016-03-26 18:06 +0100
  Re: Exclude every nth element from list? Peter Otten <__peter__@web.de> - 2016-03-26 18:06 +0100
  Re: Exclude every nth element from list? Vincent Vande Vyvre <vincent.vande.vyvre@telenet.be> - 2016-03-26 18:12 +0100
  Re: Exclude every nth element from list? BartC <bc@freeuk.com> - 2016-03-26 17:50 +0000
  Re: Exclude every nth element from list? "Sven R. Kunze" <srkunze@mail.de> - 2016-03-29 15:45 +0200

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