Generic constructors and duplication of internal Python logic

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jjl at pobox.com (John J. Lee) wrote in message news:<87ekqq41ya.fsf at pobox.com>...
> I have to check things like:
> 
>  -are there too many positional arguments?
>  -any unexpected keyword arguments?
>  -multiple keyword arguments?
>  -any duplication between positional and keyword arguments?
> 
> etc.
> 
> Surely there's some easy way of making use of Python's internal logic
> here?  For some reason, I can't see how.  Can anybody see a way?
> 
> 
> John

Have you thought of performing the checks in the __call__ method
of a custom metaclass?


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