[Python-Dev] Backporting PEP 3101 to 2.6

Nick Coghlan ncoghlan at gmail.com
Fri Jan 11 16:03:53 CET 2008

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 

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


Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia

More information about the Python-Dev mailing list