TypeError whic shouldn't happen
I would like to give some feedback about ...
From: http://www.checkio.org/mission/place-queens/solve/
In case when my function should return empty set i get error type - despite that I convert returned variable into set! I tried: K=[] K=set(K) return K
K=[] K=set(K) return set(K)
K=[] return set(K)
K=set() return K
return set()
But nothing works!
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