[Python-ideas] universal set object for use in set manipulation

[Nick Coghlan]

Greg Ewing wrote:
> Andy Kish wrote:
> 
>> It's really annoying to having appropriate identity element for
>> union built in while missing the *correct* identity element for
>> intersection.
> 
> What would
> 
>    for x in set.universal():
>      ...
> 
> do?

Raise an exception, just like a signalling NaN in decimal. An expanded
set concept with support for complementary set definitions is definitely
something that should cook on PyPI for a while though.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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