Indeed, making a slice a view does pose painful challenges. For a slice iterator, I wonder if there is an bigger overhead in being an iterator or building an iterator. I wholeheartedly agree that 'adding add-hoc functionality' is slightly toy-ish, but I brought up the idea of 'start' and 'stop' parameters because I believed that mentioning just these two things themselves are humbly adequately below that 'troublesome' or 'complex' line. Yes, Numpy's slice is a view and that is memory efficient. Memory_view, lazy_slice, View_object, and other terms, quite an expansive room of considerations.
For discussions-sake, I would like to comment about: 'Frankly, I didn't see a lot of use-cases at the time -- but now it seems that we have some more, and some more interest.'. Indeed, if one puts on a perspective glasses of 'use-cases', it's obvious that there is no urgency, no real-time necessity for that. We can see that there is growing interest, but just my opinion, the more deserving point is that it exhibits intelligence and power. Intelligence because a users gets to choose what to do with that sublist 'before' it takes memory - it's intelligent not to use resources unless explicitly told to, like a generator. Power because if I can 'specify' that section of a list without making a copy, I'm effectively achieving the same thing as many would using for-loop + range() + indices. It has that tiny little conceptual resemblance to how reversed() being much better than for-loop + range() + negative_indices, when iterating backwards. I'm schooled by how there was a history archive on this. Thanks for the links. Thanks for the input. _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/AJNG4C6QJ372HO3UKVT63HJXAPFKWX6P/ Code of Conduct: http://python.org/psf/codeofconduct/
