How to support a non-standard encoding?

From	Ivan <ivan@llaisdy.com>
Newsgroups	comp.lang.python
Subject	How to support a non-standard encoding?
Date	2012-01-06 10:03 +0000
Organization	UK Free Software Network
Message-ID	<je6guf$pns$1@localhost.localdomain> (permalink)

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Dear All

I'm developing a python application for which I need to support a 
non-standard character encoding (specifically ISO 6937/2-1983, Addendum 
1-1989).  Here are some of the properties of the encoding and its use in 
the application:

   - I need to read and write data to/from files.  The file format
     includes two sections in different character encodings (so I
     shan't be able to use codecs.open()).

   - iso-6937 sections include non-printing control characters

   - iso-6937 is a variable width encoding, e.g. "A" = [41],
     "Ä" = [0xC8, 0x41]; all non-spacing diacritical marks are in the
     range 0xC0-0xCF.

By any chance is there anyone out there working on iso-6937?

Otherwise, I think I need to write a new codec to support reading and 
writing this data.  Does anyone know of any tutorials or blog posts on 
implementing a codec for a non-standard characeter encoding?  Would 
anyone be interested in reading one?

With thanks and best wishes

Ivan


-- 
============================================================
Ivan A. Uemlianin
Llaisdy
Speech Technology Research and Development

                     ivan@llaisdy.com
                      www.llaisdy.com
                          llaisdy.wordpress.com
               github.com/llaisdy
                      www.linkedin.com/in/ivanuemlianin

     "Froh, froh! Wie seine Sonnen, seine Sonnen fliegen"
                      (Schiller, Beethoven)
============================================================

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How to support a non-standard encoding? Ivan <ivan@llaisdy.com> - 2012-01-06 10:03 +0000
  Re: How to support a non-standard encoding? Tim Wintle <tim.wintle@teamrubber.com> - 2012-01-06 13:47 +0000
  Re: How to support a non-standard encoding? Ivan Uemlianin <ivan@llaisdy.com> - 2012-01-06 14:03 +0000
  Re: How to support a non-standard encoding? jmfauth <wxjmfauth@gmail.com> - 2012-01-06 12:00 -0800
    Re: How to support a non-standard encoding? Tim Wintle <tim.wintle@teamrubber.com> - 2012-01-06 20:42 +0000
      Re: How to support a non-standard encoding? Ivan <ivan@llaisdy.com> - 2012-01-08 08:50 +0000
    Re: How to support a non-standard encoding? Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2012-01-08 12:16 +0100

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