[Python-ideas] exclusively1, common, exclusively2 = set1 - set2, set1 & set2, set2 - set1

[Shane Green]

subsets?


On Jul 6, 2013, at 1:06 PM, Jan Kaliszewski <zuo at chopin.edu.pl> wrote:

> 06.07.2013 19:26, Steven D'Aprano wrote:
> 
>> On 07/07/13 01:34, Stephen J. Turnbull wrote:
>>> Steven D'Aprano writes:
>>> 
>>>  > "partition" is not the ideal name for this method,
>>> 
>>> +1
>>> 
>>> It would completely confuse anybody who did want a partition.
>>> 
>>>  > but the actual operation itself is very useful. I have often done
>>>  > this, mostly on dict views rather than sets. In my head, it's an
>>>  > obvious operation, to split a pair of sets into three, spoiled only
>>>  > by lack of a good name.
>>>  >
>>>  > Perhaps "split" is a reasonable name?
>>>  >
>>>  > only1, both, only2 = set1.split(set2)
>>> 
>>> -1
>>> 
>>> Set splitting is an intractable problem.
>>> https://en.wikipedia.org/wiki/Set_splitting_problem
> [...]
>>> I propose "join".[1]
>> ...
>>> [1]  Or maybe it's the meet?  I never can keep the two straight....
>> 
>> I don't think that either is appropriate. Join and meet are
>> operations on a single set, not a pair of them
> [...]
> 
> Other ideas for the method name:
> 
> * trisect
> * trisection
> * cover
> * over
> * overlap
> * interfere
> 
> Cheers.
> *j
> 
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