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From: Robin Becker <robin@reportlab.com>
Subject: Re: =?UTF-8?B?J1N0cmHDn2UnICgnU3RyYXNzZScpIGFuZCBQeXRob24gMg==?=
Date: Wed, 15 Jan 2014 12:00:51 +0000
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Xref: csiph.com comp.lang.python:63971

On 12/01/2014 07:50, wxjmfauth@gmail.com wrote:
>>>> sys.version
> 2.7.6 (default, Nov 10 2013, 19:24:18) [MSC v.1500 32 bit (Intel)]
>>>> s = 'Straße'
>>>> assert len(s) == 6
>>>> assert s[5] == 'e'
>>>>
>
> jmf
>

On my utf8 based system


> robin@everest ~:
> $ cat ooo.py
> if __name__=='__main__':
>     import sys
>     s='A̅B'
>     print('version_info=%s\nlen(%s)=%d' % (sys.version_info,s,len(s)))
> robin@everest ~:
> $ python ooo.py
> version_info=sys.version_info(major=3, minor=3, micro=3, releaselevel='final', serial=0)
> len(A̅B)=3
> robin@everest ~:
> $


so two 'characters' are 3 (or 2 or more) codepoints. If I want to isolate so 
called graphemes I need an algorithm even for python's unicode ie when it really 
matters, python3 str is just another encoding.
-- 
Robin Becker