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Re: Newbie question about text encoding

References (16 earlier) <877fusybkb.fsf@elektro.pacujo.net> <mailman.154.1425749228.21433.python-list@python.org> <87y4n8wvc3.fsf@elektro.pacujo.net> <mailman.155.1425751200.21433.python-list@python.org> <mdfega$6bj$1@dont-email.me>
Date 2015-03-08 05:13 +1100
Subject Re: Newbie question about text encoding
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.156.1425751992.21433.python-list@python.org> (permalink)

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On Sun, Mar 8, 2015 at 5:02 AM, Dan Sommers <dan@tombstonezero.net> wrote:
> On Sun, 08 Mar 2015 04:59:56 +1100, Chris Angelico wrote:
>
>> On Sun, Mar 8, 2015 at 4:50 AM, Marko Rauhamaa <marko@pacujo.net> wrote:
>
>>> Correct. Linux pathnames are octet strings regardless of the locale.
>>>
>>> That's why Linux developers should refer to filenames using bytes.
>>> Unfortunately, Python itself violates that principle by having
>>> os.listdir() return str objects (to mention one example).
>>
>> Only because you gave it a str with the path name. If you want to
>> refer to file names using bytes, then be consistent and refer to ALL
>> file names using bytes. As I demonstrated, that works just fine.
>
> Python 3.4.2 (default, Oct  8 2014, 10:45:20)
> [GCC 4.9.1] on linux
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import os
>>>> type(os.listdir(os.curdir)[0])
> <class 'str'>

Help on module os:

DESCRIPTION
    This exports:
      - os.curdir is a string representing the current directory ('.' or ':')
      - os.pardir is a string representing the parent directory ('..' or '::')

Explicitly documented as strings. If you want to work with strings,
work with strings. If you want to work with bytes, don't use
os.curdir, use bytes instead. Personally, I'm happy using strings, but
if you want to go down the path of using bytes, you simply have to be
consistent, and that probably means being platform-dependent anyway,
so just use b"." for the current directory.

Normally, using Unicode strings for file names will work just fine.
Any name that you craft yourself will be correctly encoded for the
target file system (or UTF-8 if you can't know), and any that you get
back from os.listdir or equivalent will be usable in file name
contexts. What else can you do with a file name that isn't encoded the
way you expect it to be? Unless you have some out-of-band encoding
information, you can't do anything meaningful with the stream of
bytes, other than keeping it exactly as it is.

ChrisA

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Newbie question about text encoding pierrick.brihaye@gmail.com - 2015-02-24 02:49 -0800
  Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-24 22:09 +1100
  Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-24 06:25 -0500
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 15:55 +0100
  Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-25 02:03 +1100
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 16:06 +0100
    Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-02-24 08:01 -0800
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 16:07 +0100
  Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-25 02:10 +1100
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 16:24 +0100
  Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-25 02:33 +1100
  Re: Newbie question about text encoding random832@fastmail.us - 2015-02-24 10:38 -0500
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 17:20 +0100
  Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-25 03:24 +1100
  Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-24 12:13 -0500
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 20:45 +0100
    Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-02-25 00:21 +0200
    Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-25 12:20 +1100
      Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-02-25 06:34 -0800
  Re: Newbie question about text encoding Laura Creighton <lac@openend.se> - 2015-02-24 20:57 +0100
    Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-25 12:19 +1100
      Re: Newbie question about text encoding Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com> - 2015-02-25 12:54 +0800
  Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-24 15:41 -0500
    Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-02-26 04:40 -0800
      Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-02-26 05:15 -0800
      Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-27 00:24 +1100
        Re: Newbie question about text encoding Sam Raker <sam.raker@gmail.com> - 2015-02-26 08:45 -0800
          Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-02-26 09:08 -0800
      Re: Newbie question about text encoding Terry Reedy <tjreedy@udel.edu> - 2015-02-26 12:02 -0500
        Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-02-26 09:59 -0800
          Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-02-26 12:20 -0800
          Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-27 09:13 +1100
          Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-27 12:05 +1100
            Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-26 20:57 -0500
              Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-27 16:58 +1100
                Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-27 02:30 -0500
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-27 22:54 +1100
                Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-27 09:02 -0500
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-28 01:22 +1100
                Re: Newbie question about text encoding alister <alister.nospam.ware@ntlworld.com> - 2015-02-27 16:00 +0000
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-28 03:12 +1100
                Re: Newbie question about text encoding alister <alister.nospam.ware@ntlworld.com> - 2015-02-27 16:45 +0000
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-28 04:45 +1100
                Re: Newbie question about text encoding alister <alister.nospam.ware@ntlworld.com> - 2015-02-27 22:13 +0000
                Re: Newbie question about text encoding MRAB <python@mrabarnett.plus.com> - 2015-02-27 19:14 +0000
                Re: Newbie question about text encoding alister <alister.nospam.ware@ntlworld.com> - 2015-02-27 22:09 +0000
                Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-27 15:52 -0500
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-28 08:04 +1100
                Re: Newbie question about text encoding Dave Angel <davea@davea.name> - 2015-02-27 10:24 -0500
                Re: Newbie question about text encoding Grant Edwards <invalid@invalid.invalid> - 2015-02-27 17:46 +0000
                Re: Newbie question about text encoding Grant Edwards <invalid@invalid.invalid> - 2015-02-27 17:47 +0000
            Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-02-27 01:06 -0800
        Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-02-26 11:59 -0800
        Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 10:03 -0800
          Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-03 10:36 -0800
            Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 20:45 -0800
              Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-04 15:54 +1100
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 21:05 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-06 01:06 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-05 06:59 -0800
                Re: Newbie question about text encoding random832@fastmail.us - 2015-03-05 14:59 -0500
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-06 09:33 +1100
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-05 20:53 -0800
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-06 16:20 +1100
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-06 01:02 -0800
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-06 01:06 -0800
                Re: Newbie question about text encoding random832@fastmail.us - 2015-03-06 08:33 -0500
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 00:39 +1100
                Re: Newbie question about text encoding random832@fastmail.us - 2015-03-06 09:03 -0500
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 01:11 +1100
                Re: Newbie question about text encoding random832@fastmail.us - 2015-03-06 09:27 -0500
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-07 03:26 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-06 20:54 +1100
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-06 02:07 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-07 01:50 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 02:27 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-06 07:37 -0800
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-06 08:20 -0800
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 03:45 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-06 11:41 -0800
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-06 11:58 -0800
                Re: Newbie question about text encoding Terry Reedy <tjreedy@udel.edu> - 2015-03-07 01:11 -0500
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-06 23:43 -0800
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-07 00:55 -0800
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-07 01:08 -0800
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-07 21:25 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-07 22:09 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 22:33 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 13:53 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-07 23:02 +1100
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 14:07 +0000
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-07 07:28 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-08 02:40 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 17:48 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 03:17 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 18:25 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 03:41 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 18:54 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 03:58 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 04:00 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 19:14 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 04:26 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 19:50 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 04:59 +1100
                Re: Newbie question about text encoding Dan Sommers <dan@tombstonezero.net> - 2015-03-07 18:02 +0000
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 05:13 +1100
                Re: Newbie question about text encoding Dan Sommers <dan@tombstonezero.net> - 2015-03-07 18:34 +0000
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 05:44 +1100
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 19:00 +0000
                Re: Newbie question about text encoding Dan Sommers <dan@tombstonezero.net> - 2015-03-07 19:16 +0000
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 21:01 +0200
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 16:40 +0000
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 18:48 +0200
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 17:02 +0000
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-07 19:16 +0200
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 18:18 +0000
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-07 21:06 -0800
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 03:53 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-07 11:03 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-08 12:45 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-08 09:20 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 18:37 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-08 10:09 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-08 19:23 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-08 01:18 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-09 05:25 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-08 22:09 +0200
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-09 12:43 +1100
                Re: Newbie question about text encoding Ben Finney <ben+python@benfinney.id.au> - 2015-03-09 13:09 +1100
                Re: Newbie question about text encoding Marko Rauhamaa <marko@pacujo.net> - 2015-03-09 08:31 +0200
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-09 13:18 +1100
                Re: Newbie question about text encoding random832@fastmail.us - 2015-03-09 00:27 -0400
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-09 07:55 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-09 08:13 +1100
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-09 17:34 +1100
                Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-09 17:44 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-09 02:08 -0700
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-09 07:26 -0700
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-09 05:28 -0700
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-08 19:01 +1100
                Re: Newbie question about text encoding Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-03-07 14:13 +0000
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-07 23:23 -0800
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-09 05:30 +1100
                Re: Newbie question about text encoding Cameron Simpson <cs@zip.com.au> - 2015-03-09 13:09 +1100
                Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-08 19:42 -0700
                Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-04 19:16 +1100
          Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-04 05:43 +1100
            Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 18:53 -0800
          Re: Newbie question about text encoding Terry Reedy <tjreedy@udel.edu> - 2015-03-03 18:30 -0500
          Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-04 13:54 +1100
            Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-03-04 14:02 +1100
            Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 20:05 -0800
              Re: Newbie question about text encoding Rustom Mody <rustompmody@gmail.com> - 2015-03-03 20:16 -0800
              Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-03-04 19:14 +1100
                Re: Newbie question about text encoding wxjmfauth@gmail.com - 2015-03-04 02:16 -0800
      Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-27 04:29 +1100
        Re: Newbie question about text encoding Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-27 10:09 +1100
          Re: Newbie question about text encoding Chris Angelico <rosuav@gmail.com> - 2015-02-27 10:23 +1100

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