En Thu, 19 Mar 2009 08:06:35 -0200, mattia <ger...@gmail.com> escribió:
OK, understood. Now, as a general rule, is it correct to say: - use generator expression when I just need to iterate over the list or call a function that involve an iterator (e.g. sum) and get the result, so the list is not necessary anymore - use list comprehensions when I actually have to use the list (e.g. I need to swap some values or I need to use sorted() etc.) Am I right?
Yes, at least that's how I use them: a generator expression when the elements are consumed one by one in the same moment, and a list comprehension when I actually want the list as a whole.
(Note that sorted() has to return a new list anyway, its argument may be a gen.expr. but sorted() starts by making a list out of it; you may be thinking of the list.sort() method)
-- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
