On Fri, Jun 15, 2012 at 9:52 AM, Benjamin Peterson <benja...@python.org> wrote:
> 2012/6/15 Larry Hastings <la...@hastings.org>:
>> If I understand you correctly, you seem to be trying to apply
>> "is_implemented" to the problem of predicting which specific inputs to a
>> parameter would be valid.  I don't think that problem is tractable--it's way
>> too context-specific.
>
> Exactly! It's too context sensitive to belong on a generic signature
> object. Without is_implemented, all the properties of the signature
> object should only change if you alter the parameter list. How a
> parameter is dealt with in the function should not affect the
> signature of a function.
>

I agree. It seems to me is_implemented solves too small a class of the
problem it attacks to be worth including in the signature.

>
> --
> Regards,
> Benjamin
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