On Tue, May 20, 2008 at 11:19 AM, John Salerno <[EMAIL PROTECTED]> wrote: > "Diez B. Roggisch" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED] >> After being corrected about missing the construction of a None-containing >> list, one needs of course to think about the waste of resources, as a >> possible result-list is created in any case. > > Yeah, I was already aware of the list of Nones, which is why I asked. Simply > typing the list comprehension without an assignment just *looked* wrong, > too.
It sounds like the wasteful list creation is the biggest objection to using a list comprehension. I'm curious what people think of this alternative, which avoids populating the list by using a generator expression instead (apart from the fact that this is still quadratic, which I'm aware of). def compress(s): new = [] filter(None, (new.append(c) for c in s if c not in new)) return ''.join(new) -- http://mail.python.org/mailman/listinfo/python-list
