[Python-Dev] Decoder functions accept str in py3k

[Guido van Rossum]

OK, ignore my previous comment. Sounds like the inidividual codecs
need to tighten their type checking though -- perhaps *that* can be
fixed in 3.0.1? I really don't see why any codec used to convert
between text and bytes should support its output type as input.

--Guido

On Wed, Jan 7, 2009 at 10:26 AM, M.-A. Lemburg <mal at egenix.com> wrote:
> On 2009-01-07 16:34, Guido van Rossum wrote:
>> Sounds like yet another remnant of the old philosophy, which indeed
>> supported encode and decode operations on both string types. :-(
>
> No, that's something I explicitly readded to Python 3k, since the
> codecs interface is independent of the input and output types (the
> codecs decide which combinations to support).
>
> The bytes and Unicode *methods* do guarantee that you get either
> Unicode or bytes as output.
>
>> On Wed, Jan 7, 2009 at 5:39 AM, Antoine Pitrou <solipsis at pitrou.net> wrote:
>>> Hello,
>>>
>>> I've just noticed that in py3k, the decoding functions in the codecs module
>>> accept str objects as well as bytes:
>>>
>>>  # import codecs
>>>  # c = codecs.getdecoder('utf8')
>>>  # c('aa')
>>>  ('aa', 2)
>>>  # c('éé')
>>>  ('éé', 4)
>>>  # c = codecs.getdecoder('latin1')
>>>  # c('aa')
>>>  ('aa', 2)
>>>  # c('éé')
>>>  ('Ã(c)Ã(c)', 4)
>>>
>>> Is it a bug?
>>>
>>> Regards
>>>
>>> Antoine.
>>>
>>>
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>>
>>
>>
>
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> Marc-Andre Lemburg
> eGenix.com
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-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)