Steven D'Aprano added the comment: Apart from being "cool", what is the purpose of this key argument?
For the example shown, where you extract an item from tuple data: >>> median_low([(1, 2), (3, 3), (4, 1)], key=lambda elem: elem[0]) (3, 3) I'm not sure I understand when you would use this, and why you would describe (3,3) as a median (a kind of average) of the given data. By the way, although it's not (yet?) officially supported, it turns out that this works: py> median_low([(1, 2), (3, 3), (4, 1)]) (3, 3) Officially, median requires numeric data. If the median* functions were to support tuples, I would be inclined to return a new tuple with the median of each column, as such: median_low([(1, 2), (3, 3), (4, 1)]) (3, 2) # median of 1,3,4 and median of 2,3,1 I can think of uses for that, e.g. calculating the "Q" correlation coefficient. What uses do you have for your suggested key argument? ---------- nosy: +steven.daprano _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30999> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
