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 -- http://mail.python.org/mailman/listinfo/python-list
