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| Date | Tue, 23 Jul 2013 08:39:59 -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 7:42 AM, Vincent Vande Vyvre <
vincent.vandevyvre@swing.be> 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.
>
> 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))
>
I must ask why you are setting strings with a newline line ending only to
replace them later with os.linesep. This seems convoluted compared to
doing something like
def write():
strings = ['#-*- coding: utf-8 -*-', 'import os', 'import sys']
with open('writetest.py', 'w') as outf:
for s in strings:
outf.write(s)
outf.write(L_SEP)
Or something equivalent.
If, however, the source strings come from a file you've created somewhere
(and are loaded by reading in that file line by line), then I can see a
problem. DOS line endings are carriage returns ('\r\n'), whereas standard
UNIX files use just newlines ('\n'). Therefore, if you are using the code:
s.replace('\n', L_SEP)
in Windows, using a Windows-generated file, then what you are likely doing
is converting the string sequence '\r\n' into '\r\r\n', which is not what
you want to do. I can imagine some text editors interpreting that as two
endlines (since there are 2 \r's). Indeed, when I execute the code:
>>> l = open('test.txt', 'w')
>>> l.write('This is the first line\r\r\n')
>>> l.write('This is the second\r\r\n')
>>> l.close()
on UNIX and open the resulting file in gedit, it is double-spaced, but if I
just dump it to the screen using 'cat', it is single-spaced.
If you want to make your code a bit more cross-platform, you should strip
out all types of end line characters from the strings before you write
them. So something like this:
with open('writetest.py', 'w') as outf:
for s in strings:
outf.write(s.rstrip('\r\n'))
outf.write(L_SEP)
Hope this helps,
Jason
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Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-22 22:29 +1000
Re: Simple Python script as SMTP server for outgoing e-mails? Gilles <nospam@nospam.com> - 2013-07-22 14:38 +0200
Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-22 22:51 +1000
Re: Simple Python script as SMTP server for outgoing e-mails? Michael Torrie <torriem@gmail.com> - 2013-07-22 08:08 -0600
Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-23 00:15 +1000
Re: Simple Python script as SMTP server for outgoing e-mails? Duncan Booth <duncan.booth@invalid.invalid> - 2013-07-23 08:06 +0000
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
Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-24 07:37 +1000
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
Re: [OT] SPF - was Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-24 07:47 +1000
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Re: Simple Python script as SMTP server for outgoing e-mails? Chris Angelico <rosuav@gmail.com> - 2013-07-23 02:32 +1000
Re: Simple Python script as SMTP server for outgoing e-mails? "Eric S. Johansson" <esj@harvee.org> - 2013-07-22 08:54 -0400
Re: Simple Python script as SMTP server for outgoing e-mails? Gilles <nospam@nospam.com> - 2013-07-23 23:48 +0200
Re: Simple Python script as SMTP server for outgoing e-mails? Michael Torrie <torriem@gmail.com> - 2013-07-22 08:10 -0600
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Re: Simple Python script as SMTP server for outgoing e-mails? Grant Edwards <invalid@invalid.invalid> - 2013-07-21 21:01 +0000
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Re: Simple Python script as SMTP server for outgoing e-mails? Grant Edwards <invalid@invalid.invalid> - 2013-07-22 14:10 +0000
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