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Groups > comp.lang.python > #19677

Re: Iterate from 2nd element of a huge list

Date 2012-02-01 13:02 +1100
From Cameron Simpson <cs@zip.com.au>
Subject Re: Iterate from 2nd element of a huge list
References <jga54q$vqg$1@speranza.aioe.org>
Newsgroups comp.lang.python
Message-ID <mailman.5280.1328061789.27778.python-list@python.org> (permalink)

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On 01Feb2012 01:39, Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> wrote:
| What is the best way to iterate thru a huge list having the 1st element
| a different process? I.e.:
| 
| process1(mylist[0])
| for el in mylist[1:]:
| 	process2(el)
| 
| This way mylist is almost duplicated, isn't it?

Yep.

What about (untested):

  process1(mylist[0])
  for i in xrange(1,len(mylist)):
  	process2(mylist[i])

Cheers,
-- 
Cameron Simpson <cs@zip.com.au> DoD#743
http://www.cskk.ezoshosting.com/cs/

The truth is, I will not give myself the trouble to write sense long, for I
would as soon please fools as wise men; because fools are more numerous, and
every prudent man will go with the majority.    - Hugh Henry Brackenridge

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Thread

Iterate from 2nd element of a huge list Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2012-02-01 01:39 +0000
  Re: Iterate from 2nd element of a huge list Cameron Simpson <cs@zip.com.au> - 2012-02-01 13:02 +1100
  Re: Iterate from 2nd element of a huge list duncan smith <buzzard@urubu.freeserve.co.uk> - 2012-02-01 02:31 +0000
  Re: Iterate from 2nd element of a huge list Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-01 02:43 +0000
  Re: Iterate from 2nd element of a huge list Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2012-02-01 03:16 +0000
    Re: Iterate from 2nd element of a huge list Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2012-02-01 03:34 +0000
      Re: Iterate from 2nd element of a huge list Cameron Simpson <cs@zip.com.au> - 2012-02-01 15:55 +1100
        Re: Iterate from 2nd element of a huge list Paulo da Silva <p_s_d_a_s_i_l_v_a@netcabo.pt> - 2012-02-02 07:23 +0000
          Re: Iterate from 2nd element of a huge list Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-02-02 07:38 +0000
    Re: Iterate from 2nd element of a huge list Arnaud Delobelle <arnodel@gmail.com> - 2012-02-01 07:09 +0000
    Re: Iterate from 2nd element of a huge list Peter Otten <__peter__@web.de> - 2012-02-01 09:11 +0100
    Re: Iterate from 2nd element of a huge list Arnaud Delobelle <arnodel@gmail.com> - 2012-02-01 10:54 +0000
  Re: Iterate from 2nd element of a huge list Paul Rubin <no.email@nospam.invalid> - 2012-02-01 01:25 -0800
    Re: Iterate from 2nd element of a huge list Stefan Behnel <stefan_ml@behnel.de> - 2012-02-01 12:28 +0100

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