The question was perfectly answered by Heiko Wundram: f(*(a+[4])) I know python is not a lawnmower but a programming language. I can solve a lot of problems, but I prefer short, clear and nice solutions to long and/or too powerful ones. So, my problem with my solution (b = list(a); b.append(4)) was the same as with the others' involving functions.
Actually what I missed is the fact that the + operator works fine with lists... With '+' I can solve everything. Ok, _almost_ everything :) Thanks for everybody! Szabi -- http://mail.python.org/mailman/listinfo/python-list
