[Python-Dev] AC Derby and accepting None for optional positional arguments
Larry Hastings
larry at hastings.org
Thu Jan 16 20:43:31 CET 2014
On 01/16/2014 04:21 AM, MRAB wrote:
> On 2014-01-16 05:32, Larry Hastings wrote:
> [snip]
>
>> We could add a special value, let's call it
>> sys.NULL, whose specific semantics are "turns into NULL when passed into
>> builtins". This would solve the problem but it's really, really awful.
>>
> Would it be better if it were called "__null__"?
No. The problem is not the name, the problem is in the semantics. This
would mean a permanent special case in Python's argument parsing (and
"special cases aren't special enough to break the rules"), and would
inflict these same awful semantics on alternate implementations like
PyPy, Jython, and IronPython.
//arry/
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