[Python-Dev] Very Strange Argument Handling Behavior

[Benjamin Peterson]

2010/4/17 Guido van Rossum <guido at python.org>:
> On Sat, Apr 17, 2010 at 9:22 AM, Nick Coghlan <ncoghlan at gmail.com> wrote:
>> Guido van Rossum wrote:
>>> Because Python promises that the object the callee sees as 'kwargs' is
>>> "just a dict".
>>
>> Huh, I thought kwargs was allowed to be implemented as a
>> string-keys-only dict (similar to class and module namespaces) while
>> still be a valid Python implementation. I guess I was wrong.
>
> Actually I don't know about that. Is there language anywhere in the
> language reference that says this? What do IronPython, Jython, PyPy
> actually do?

Similar to CPython, PyPy has dict versions optimized for strings,
which fall back to the general version when given non-string keys.


-- 
Regards,
Benjamin