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Fri Jan 11 17:19:02 CET 2008 · https://mail.python.org/pipermail/python-dev/2008-January/076099.html

Nick Coghlan wrote:
> Guido van Rossum wrote:
>> For data types whose output uses only ASCII, would it be acceptable if
>> they always returned an 8-bit string and left it up to the caller to
>> convert it to Unicode? This would apply to all numeric types. (The
>> date/time types have a strftime() style API which means the user must
>> be able to specifiy Unicode.)
> 
> To elaborate on this a bit (and handwaving a lot of important details 
> out of the way) do you mean something like the following for the builtin 
> format?:
> 
> def format(obj, fmt_spec=None):
>      if fmt_spec is None: fmt_spec=''
>      result = obj.__format__(fmt_spec)
>      if isinstance(fmt_spec, unicode):
>          if isinstance(result, str):
>              result = unicode(result)
>      return result
> 
Isn't unicode idempotent? Couldn't

          if isinstance(result, str):
              result = unicode(result)

avoid repeating in Python a test already made in C by re-spelling it as

         result = unicode(result)

or have you hand-waved away important details that mean the test really 
is required?

regards
  Steve
-- 
Steve Holden        +1 571 484 6266   +1 800 494 3119
Holden Web LLC              http://www.holdenweb.com/

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[Python-Dev] Backporting PEP 3101 to 2.6