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Showing content from https://mail.python.org/pipermail/python-dev/2002-August/028337.html below:

[Python-Dev] type categories

[Python-Dev] type categoriesOren Tirosh oren-py-d@hishome.net
Mon, 26 Aug 2002 15:03:22 -0400
On Mon, Aug 26, 2002 at 11:57:31AM -0400, Andrew Koenig wrote:
> Incidentally, it just occurred to me that if we regard categories
> as claims about types (or, if you like, predicate functions with type
> arguments), then it makes sense to include (Cartesian) product types.

Would such as product type be anything more than than a predicate about 
tuples?  Something like the (T1, T2, T3) case in Guido's static typing
presentation[1] where T1, T2 and T3 are type predicates rather than just 
types.

[1] http://www.python.org/~guido/static-typing/sld008.htm )

	Oren



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