On 1 Dec 2005 05:45:54 -0800, "Niels L Ellegaard" <[EMAIL PROTECTED]> wrote:
>I just started learning python and I have been wondering. Is there a >short pythonic way to find the element, x, of a list, mylist, that >maximizes an expression f(x). > >In other words I am looking for a short version of the following: > >pair=[mylist[0],f(mylist[0])] >for x in mylist[1:]: > if f(x) > pair[1]: > pair=[x,f(x)] > Reversing the order of the pair: >>> mylist = range(10) >>> def f(x): return 10-(x-5)**2 ... >>> [f(x) for x in mylist] [-15, -6, 1, 6, 9, 10, 9, 6, 1, -6] Then one line should do it: >>> max((f(x),x) for x in mylist) (10, 5) Ok, be picky ;-) >>> pair = list(reversed(max((f(x),x) for x in mylist))) >>> pair [5, 10] Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
