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Groups > comp.lang.python > #90760

Re: Fastest way to remove the first x characters from a very long string

Date 2015-05-17 08:41 +1000
From Cameron Simpson <cs@zip.com.au>
Subject Re: Fastest way to remove the first x characters from a very long string
References <8354e4ba-0a80-48a1-b2e9-6edb4b67ff36@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.87.1431817664.17265.python-list@python.org> (permalink)

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On 16May2015 10:35, bruceg113355@gmail.com <bruceg113355@gmail.com> wrote:
>On Saturday, May 16, 2015 at 12:59:19 PM UTC-4, Chris Angelico wrote:
>> On Sun, May 17, 2015 at 2:22 AM,  <bruceg113355@gmail.com> wrote:
>> > # Original Approach
>> > # -----------------
>> > ss = ss.split("\n")
>> > ss1 = ""
>> > for sdata in ss:
>> >     ss1 = ss1 + (sdata[OFFSET:] + "\n")
>> >
>> > # Chris's Approach
>> > # ----------------
>> > lines = ss.split("\n")
>> > new_text = "\n".join(line[8:] for line in lines)
[...]
>
>Your approach more than meets my requirements.
>Data is formatted correctly and performance is simply amazing.
>OFFSET and \n are small details.

The only comment I'd make at this point is to consider if you really need a 
single string at the end. Keeping it as a list of lines may be more flexible.  
(It will consume more memory.) If you're doing more stuff with the string as 
lines then you'd need to re-split it, and so forth.

Cheers,
Cameron Simpson <cs@zip.com.au>

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Thread

Fastest way to remove the first x characters from a very long string bruceg113355@gmail.com - 2015-05-16 06:28 -0700
  Re: Fastest way to remove the first x characters from a very long string Joel Goldstick <joel.goldstick@gmail.com> - 2015-05-16 09:43 -0400
  Re: Fastest way to remove the first x characters from a very long string Chris Angelico <rosuav@gmail.com> - 2015-05-16 23:45 +1000
    Re: Fastest way to remove the first x characters from a very long string bruceg113355@gmail.com - 2015-05-16 07:02 -0700
      Re: Fastest way to remove the first x characters from a very long string bruceg113355@gmail.com - 2015-05-16 09:22 -0700
        Re: Fastest way to remove the first x characters from a very long string Ian Kelly <ian.g.kelly@gmail.com> - 2015-05-16 10:57 -0600
        Re: Fastest way to remove the first x characters from a very long string Chris Angelico <rosuav@gmail.com> - 2015-05-17 02:59 +1000
          Re: Fastest way to remove the first x characters from a very long string bruceg113355@gmail.com - 2015-05-16 10:35 -0700
            Re: Fastest way to remove the first x characters from a very long string Cameron Simpson <cs@zip.com.au> - 2015-05-17 08:41 +1000
  Re: Fastest way to remove the first x characters from a very long string Grant Edwards <invalid@invalid.invalid> - 2015-05-16 14:59 +0000
    Re: Fastest way to remove the first x characters from a very long string Rustom Mody <rustompmody@gmail.com> - 2015-05-16 08:13 -0700
      Re: Fastest way to remove the first x characters from a very long string bruceg113355@gmail.com - 2015-05-16 09:24 -0700
        Re: Fastest way to remove the first x characters from a very long string Irmen de Jong <irmen.NOSPAM@xs4all.nl> - 2015-05-16 18:55 +0200
  Re: Fastest way to remove the first x characters from a very long string Denis McMahon <denismfmcmahon@gmail.com> - 2015-05-16 23:24 +0000

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