Simon Friedberger <simon.nov2...@a-oben.org> added the comment:

And, just to state this explicitly, I think you are right that there are 
general idioms for checking if a generator can produce an item but I think it 
would be nicer if iterators which could do this is in a cheap way (like in this 
case) would allow it explicitly.

I don't know, maybe I'm wrong. Just seems nice. :)

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38789>
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