[Python-Dev] Very Strange Argument Handling Behavior

[Michael Foord]

On 16/04/2010 17:06, Mark Dickinson wrote:
> On Fri, Apr 16, 2010 at 3:57 PM, Antoine Pitrou<solipsis at pitrou.net>  wrote:
>    
>> Mark Dickinson<dickinsm<at>  gmail.com>  writes:
>>      
>>> Okay;  I'll open an issue for deprecation in 3.2 and removal in 3.3.
>>>
>>> Can this sneak in under the 'incorrect language semantics' exemption
>>> for PEP 3003 (the moratorium PEP)?  If not, then deprecation
>>> presumably has to wait for 3.3.
>>>        
>> It seems that in spirit the moratorium applies more to language additions than
>> to removals/limitations. The goal being that alternate implementation stop
>> chasing a moving target in terms of features.
>>
>> So IMVHO it is fine for 3.2.
>>      
> Removing it certainly seems in keeping with the goal of making life
> easier for alternate implementations.  (Out of curiosity, does anyone
> know what IronPython does here?)
>    

Same as Jython and PyPy:

IronPython 2.6.1 (2.6.10920.0) on .NET 2.0.50727.4927
Type "help", "copyright", "credits" or "license" for more information.
 >>> dict(**{1: 'hi'})
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
TypeError: expected string for dictionary argument got 1
 >>>

Michael

> I've opened http://bugs.python.org/issue8419
>
> Mark
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