restriction on sum: intentional bug?

[Alan G Isaac]

> Alan G Isaac<alan.isaac<at>  gmail.com>  writes:
>> So of course join is better, as originally noted,
>> but that does not constitute a reason to intentionally
>> violate duck typing.


On 10/16/2009 1:03 PM, Benjamin Peterson wrote:
> As Stephen pointed out, duck typing is not an absolute.


I do not recall anyone suggesting it was.
Do you?  If so, cite them.

Thanks,
Alan Isaac