On Aug 24, 5:35 am, Boris Borcic <[EMAIL PROTECTED]> wrote: > Paul Rubin wrote: > > beginner <[EMAIL PROTECTED]> writes: > >> For example, if I have x=[ [1,2], [3,4] ] > > >> What I want is a new list of list that has four sub-lists: > > >> [[1,2], [f(1), f(2)], [3,4], [f(3), f(4)]] > > > [[a, map(f,a)] for a in x] > > no, that one will be [[[1,2], [f(1), f(2)]], [[3,4], [f(3), f(4)]]] > eg two sublists instead of four. > > [map(g,a) for a in x for g in [None,f]] > > will do it. > > ...a bit too cleverly, but there's worse : > > list((yield a) or map(f,a) for a in x) > > Cheers, BB
Really cool! -- http://mail.python.org/mailman/listinfo/python-list
