[Tutor] Best Known Method for Filtering redundant list items.

[Python]

Right after hitting send I realized I fail to preserver order.  If
preserving order is important, we're back to using more complex code.

On Thu, 2006-11-30 at 16:01 -0500, Python wrote:
> On Thu, 2006-11-30 at 12:51 -0800, Chris Hengge wrote:
> > Anyone point me to something more efficient then 
> > 
> list2 = list(set(list1))
> 
> Older Pythons will force you to import sets and use sets.Set
> 
> > for item in list1:
> >      if item not in list2:
> >            list2.append()
> > 
> > This just seems to take a bit a time when there are thousands or
> > dozens of thousands of records just to filter out the dozen or so
> > copies.. 
> > 
> > Thanks.
> > _______________________________________________
> > Tutor maillist  -  Tutor at python.org
> > http://mail.python.org/mailman/listinfo/tutor
-- 
Lloyd Kvam
Venix Corp