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Showing content from https://mail.python.org/pipermail/python-dev/2009-April/089135.html below:

Non-decodable Bytes in System Character Interfaces

[Python-Dev] PEP 383: Non-decodable Bytes in System Character Interfaces [Python-Dev] PEP 383: Non-decodable Bytes in System Character InterfacesLino Mastrodomenico l.mastrodomenico at gmail.com
Tue Apr 28 15:14:19 CEST 2009
2009/4/28 Hrvoje Niksic <hrvoje.niksic at avl.com>:
> Lino Mastrodomenico wrote:
>>
>> Since this byte sequence [b'\xed\xb3\xbf'] doesn't represent a valid
>> character when
>> decoded with UTF-8, it should simply be considered an invalid UTF-8
>> sequence of three bytes and decoded to '\udced\udcb3\udcbf' (*not*
>> '\udcff').
>
> "Should be considered" or "will be considered"?  Python 3.0's UTF-8 decoder
> happily accepts it and returns u'\udcff':
>
>>>> b'\xed\xb3\xbf'.decode('utf-8')
> '\udcff'

Only for the new utf-8b encoding (if Martin agrees), while the
existing utf-8 is fine as is (or at least waaay outside the scope of
this PEP).

-- 
Lino Mastrodomenico
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