Best way to extract an item from a set of len 1
fredrik at pythonware.com
Wed Jan 25 16:39:03 CET 2006
Peter Otten wrote:
> > When you have a set, known to be of length one, is there a "best"
> > ("most pythonic") way to retrieve that one item?
> >>> s = set(["one-and-only"])
> >>> item, = s
> >>> item
> This works for any iterable and guarantees that it contains exactly one
> item. The comma may easily be missed, though.
you can make this a bit more obvious:
>>> [item] = s
this is almost twice as fast as the fastest alternative from my previous
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