[Python-Dev] syntactic support for sets (original) (raw)

Phillip J. Eby pje at telecommunity.com
Wed Feb 1 21:03:22 CET 2006

At 01:55 PM 2/1/2006 -0500, Greg Wilson wrote:

I have a student who may be interested in adding syntactic support for sets to Python, so that:

x = {1, 2, 3, 4, 5} and: y = {z for z in x if (z % 2)} would be legal. There are of course issues (what's the syntax for a frozen set? for the empty set?),

Ones that work now:

frozenset(z for z in x if (z%2))

set()

The only case that looks slightly less than optimal is:

set((1, 2, 3, 4, 5))

But I'm not sure that it warrants a special syntax just to get rid of the extra ().

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