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Re: Strange behaviour with os.linesep

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Date Tue, 23 Jul 2013 09:35:27 -0400
Subject Re: Strange behaviour with os.linesep
From Jason Swails <jason.swails@gmail.com>
To Vincent Vande Vyvre <vincent.vandevyvre@swing.be>
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On Tue, Jul 23, 2013 at 9:26 AM, Vincent Vande Vyvre <
vincent.vandevyvre@swing.be> wrote:

> Le 23/07/2013 15:10, Vincent Vande Vyvre a écrit :
>
>  The '\n' are in the original file.
>>
>> I've tested these other versions:
>>
>> ------------------------------**-
>> def write():
>>     strings = ['# -*- coding: utf-8 -*-\n',
>>                 'import os\n',
>>                 'import sys\n']
>>     with open('writetest.py', 'w') as outf:
>>         txt = L_SEP.join([s.rstip() for s in strings]):
>>         outf.write(txt)
>> ------------------------------
>>
>> ------------------------------**-
>> def write():
>>     strings = ['# -*- coding: utf-8 -*-',
>>                 'import os',
>>                 'import sys']
>>     with open('writetest.py', 'w') as outf:
>>         txt = L_SEP.join( strings):
>>         outf.write(txt)
>> ------------------------------
>>
>> Las, no changes, always correctly displayed in MS bloc-notes but with
>> double line in other éditors.
>>
>>
> Also with:
>
> ------------------------------**----------
> def count():
>     with open('c:\\Users\\Vincent\\**writetest.py', 'r') as inf:
>         lines = inf.readlines()
>     for l in lines:
>         print(l, len(l))
>

Unrelated comment, but in general it's (much) more efficient to iterate
through a file rather than iterate through a list of strings generated by
readlines():

def count():
    with open('c:\\Users\\Vincent\\writetest.py', 'r') as inf:
        for l in lines:
            print(l, len(l))

It's also fewer lines of code.

('# -*- coding: utf-8 -*-\r\n', 25)
> ('import os\r\n', 11)
> ('import sys', 10)


Then it seems like there is an issue with your text editors that do not
play nicely with DOS-style line endings.  Gedit on my linux machine
displays the line endings correctly (that is, '\r\n' is rendered as a
single line).

Good luck,
Jason

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                Re: Simple Python script as SMTP server for outgoing e-mails? Duncan Booth <duncan.booth@invalid.invalid> - 2013-07-23 10:06 +0000
                Strange behaviour with os.linesep Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-07-23 13:42 +0200
                Re: Strange behaviour with os.linesep Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-07-23 15:25 +0000
                Re: Strange behaviour with os.linesep Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-23 19:41 -0400
                Re: Strange behaviour with os.linesep Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2013-07-23 19:51 -0400
                Re: Strange behaviour with os.linesep Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-07-24 09:02 +0200
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                Re: Strange behaviour with os.linesep Terry Reedy <tjreedy@udel.edu> - 2013-07-24 12:01 -0400
                Re: Strange behaviour with os.linesep Jason Swails <jason.swails@gmail.com> - 2013-07-23 08:39 -0400
                Re: Strange behaviour with os.linesep Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-07-23 15:10 +0200
                Re: Strange behaviour with os.linesep Vincent Vande Vyvre <vincent.vandevyvre@swing.be> - 2013-07-23 15:26 +0200
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