[Python-Dev] Retrieve an arbitrary element from a set without removing it

Willi Richert w.richert at gmx.net
Mon Oct 26 09:22:37 CET 2009


I totally agree regarding the efficiency. Code that relies on a fast "non-
removing .pop()" probably has other worse bottlenecks that should be targetted 

This would, however, relief every programmer who needs this the first time in 
his Python experience, to research how this could be most reasonably done. And 
it is more of a style question. I find the "for x in some_set: break" rather 


Am Montag, 26. Oktober 2009 08:29:36 schrieben Sie:
> I don't find the optimization issue to be very interesting in
> the case of retrieving an arbitrary element.  This isn't
> the kind of thing that typically appears in an inner-loop;
> afterall, if you've retrieved an arbitrary element without
> removing it, then successive calls to "choose" could
> potentially retrieve the exact same element again and again.
> Raymond

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