[Python-Dev] Py2.6 buildouts to the set API (original) (raw)

skip at pobox.com skip at pobox.com
Sun May 20 16:16:37 CEST 2007 

>> * New method (proposed by Shane Holloway):  s1.isdisjoint(s2).   

Mike> +1.  Disjointness verification is one of my main uses for set(),
Mike> and though I don't think that the early-out condition would
Mike> trigger often in my code, it would increase readability.

I think the readbility argument is marginal at best. I use sets frequently and to the greatest extent possible use the builtin operator support because I find that more readable. So for me, I'd be going from

if not s1 & s2:

to

if s1.isdisjoint(s2):

I'm not sure that's an improvement.

Maybe it's just me, but given two sets I frequently want to operate on s1-s2, s2-s1 and s1&s2 in different ways. I wouldn't find a disjoint operation all that useful.

Skip

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