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| Date | Wed, 24 Jul 2013 09:02:37 +0200 |
| From | Vincent Vande Vyvre <vincent.vandevyvre@swing.be> |
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| Subject | Re: Strange behaviour with os.linesep |
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Show key headers only | View raw
Le 23/07/2013 17:25, Steven D'Aprano a écrit :
> On Tue, 23 Jul 2013 13:42:13 +0200, Vincent Vande Vyvre wrote:
>
>> On Windows a script where de endline are the system line sep, the files
>> are open with a double line in Eric4, Notepad++ or Gedit but they are
>> correctly displayed in the MS Bloc-Notes.
> I suspect the problem lies with Eric4, Notepad++ and Gedit. Do you
> perhaps have to manually tell them that the file uses Windows line
> separators?
>
> I recommend opening the file in a hex editor and seeing for yourself what
> line separators are used.
>
>
>> Example with this code:
>> ----------------------------------------------
>> # -*- coding: utf-8 -*-
>>
>> import os
>> L_SEP = os.linesep
>>
>> def write():
>> strings = ['# -*- coding: utf-8 -*-\n',
>> 'import os\n',
>> 'import sys\n']
>> with open('writetest.py', 'w') as outf:
>> for s in strings:
>> outf.write(s.replace('\n', L_SEP))
>>
>> write()
>> ----------------------------------------------
>>
>> The syntax `s.replace('\n', L_SEP)`is required for portability.
> I don't think it is. Behaviour is a little different between Python 2 and
> 3, but by default, Python uses "Universal Newlines". When you open a file
> in text mode, arbitrary line separators should be automatically
> translated to \n when reading, and \n will be automatically translated to
> os.line_sep when writing.
>
>
> http://docs.python.org/3/library/functions.html#open
> http://docs.python.org/2/library/functions.html#open
>
> Some further discussion here:
>
> http://stackoverflow.com/questions/12193047/is-universal-newlines-mode-
> supposed-to-be-default-behaviour-for-open-in-python
>
>
>
In fact, in my code, the original file is open in binary mode, the line
separator is translate to \n and it is parsed by the module tokenise.
I'm not a Windows user but my code must be run also on Win, this is the
reason of the usage of os.linesep in writting.
So, now I found the solution, just write the file in binary mode and now
it is correctly open with all the editors.
Thanks all
--
Vincent V.V.
Oqapy <https://launchpad.net/oqapy> . Qarte
<https://launchpad.net/qarte> . PaQager <https://launchpad.net/paqager>
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Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-23 19:19 +1000
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
Re: Strange behaviour with os.linesep Chris Angelico <rosuav@gmail.com> - 2013-07-24 17:39 +1000
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
Re: Strange behaviour with os.linesep Jason Swails <jason.swails@gmail.com> - 2013-07-23 09:35 -0400
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Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-23 19:30 +1000
[OT] SPF - was Re: Simple Python script as SMTP server for outgoing e-mails? Michael Torrie <torriem@gmail.com> - 2013-07-23 09:12 -0600
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