Grant Edwards ha escrito: > > Or, if you happen to like the itertools modules: > > > > from itertools import imap > > ",".join(imap(str, [1, 2, 3])) > > It's nice people have invented so many ways to spell the > builting "map" ;)
Did you wonder why the Python developers bother to implement "imap" if "map" was already there? > >>> ",".join(map(str,[1,2,3])) > '1,2,3' Of course the result is the same, but "map" returns a list while "itertools.imap" returns an iterator. Fortunately, "map" will become lazy on Py3000: http://mail.python.org/pipermail/python-3000/2007-August/009207.html As you said, it won't be noticeable for short lists, but it's a good programming practice to use generators instead of lists (if you don't really need a list!) arnau -- http://mail.python.org/mailman/listinfo/python-list
