[issue9547] iterator length

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

This has been rejected before.  The core issue is that it is not a very useful operation because it consumes the iterator.   

Also, this isn't an operation worth optimizing because most iterators that do something interesting are already slower than a genexp inside a sum().

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nosy: +rhettinger

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