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Re: can't get utf8 / unicode strings from embedded python

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On 8/25/2013 1:57 PM, David M. Cotter wrote:
> i'm sorry this is so confusing, let me try to re-state the problem in as clear a way as i can.
>
> I have a C++ program, with very well tested unicode support.  All logging is done in utf8.  I have conversion routines that work flawlessly, so i can assure you there is nothing wrong with logging and unicode support in the underlying program.

> I am embedding python 2.7 into the program, and extending python with routines in my C++ program.

If you want 'well-tested' (correct) unicode support from Python, use 
3.3. Unicode in 2.x is somewhat buggy and definitely flakey. The first 
fix was to make unicode *the* text type, in 3.0. The second was to 
redesign the internals in 3.3. It is possible that 2.7 is too broken for 
what you want to do.

> I have a script, encoded in utf8, and *marked* as utf8 with this line:
>      # -*- coding: utf-8 -*-
>
> In that script, i have inline unicode text.

The example scripts that you posted pictures of do *not* have unicode 
text. They have bytestring literals with (encoded) non-ascii chars 
inside them. This is not a great idea. I am not sure what bytes you end 
up with. Apparently, not what you expect.

To make them 'unicode text', you must prepend the literals with 'u'. 
Didn't someone say this before?

> When I pass that text to my C++ program, the Python interpreter decides that these bytes are macRoman, and handily "converts" them to unicode.  To compensate, i must "convert" these "macRoman" characters encoded as utf8, back to macRoman, then "interpret" them as utf8.  In this way i can recover the original unicode.
>
> When i return a unicode string back to python, i must do the reverse so that Python gets back what it expects.
>
> This is not related to printing, or sys.stdout, it does happen with that too but focusing on that is a red-herring.  Let's focus on just passing a string into C++ then back out.
>
> This would all actually make sense IF my script was marked as being "macRoman" even tho i entered UTF8 Characters, but that is not the case.
>
> Let's prove my statements.  Here is the script, *interpreted* as MacRoman:
> http://karaoke.kjams.com/screenshots/bugs/python_unicode/script_as_macroman.png

Why are you posting pictures of code, instead of the (runnable) code 
itself, as you did with C code?

-- 
Terry Jan Reedy

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Thread

can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-23 13:49 -0700
  Re: can't get utf8 / unicode strings from embedded python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-24 01:54 +0000
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-23 23:45 -0700
    Re: can't get utf8 / unicode strings from embedded python Dave Angel <davea@davea.name> - 2013-08-24 07:04 +0000
    Re: can't get utf8 / unicode strings from embedded python random832@fastmail.us - 2013-08-24 09:49 -0400
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-24 09:47 -0700
    Re: can't get utf8 / unicode strings from embedded python wxjmfauth@gmail.com - 2013-08-24 11:31 -0700
    Re: can't get utf8 / unicode strings from embedded python Benjamin Kaplan <benjamin.kaplan@case.edu> - 2013-08-24 12:45 -0700
    Re: can't get utf8 / unicode strings from embedded python random832@fastmail.us - 2013-08-24 20:01 -0400
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-25 10:57 -0700
    Re: can't get utf8 / unicode strings from embedded python Vlastimil Brom <vlastimil.brom@gmail.com> - 2013-08-25 20:23 +0200
    Re: can't get utf8 / unicode strings from embedded python Terry Reedy <tjreedy@udel.edu> - 2013-08-25 14:59 -0400
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-25 15:25 -0700
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-25 15:32 -0700
    Re: can't get utf8 / unicode strings from embedded python MRAB <python@mrabarnett.plus.com> - 2013-08-26 01:30 +0100
      Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-27 15:21 -0700
        Re: can't get utf8 / unicode strings from embedded python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-27 23:24 +0000
          Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-27 22:57 -0700
            Re: can't get utf8 / unicode strings from embedded python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-08-28 12:03 +0000
  Re: can't get utf8 / unicode strings from embedded python "David M. Cotter" <me@davecotter.com> - 2013-08-28 10:46 -0700

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