On Thu, Nov 30, 2017 at 10:49:19AM +1300, Greg Ewing wrote:
C Anthony Risinger wrote:
Is __len__ a viable option now that __length_hint__ has been identified for hints?
No, I misremembered that feature, sorry.
But I still don't like the idea of changing behaviour depending on whether the RHS "looks like" an iterator or not.
The reason I oppose that is that in all other ways related to iteration, iterators are a perfect substitute for any other iterable: for x in iterable: pass list(iterable) function(*iterable) a, *b, c = iterable a, *b = iterable all behave identically whether iterable is a list or an iterator. This would make the last example, and only that, behave differently depending on whether you pass an iterator or some other iterable. -- Steve