Best way to make a list unique?

[Delaney, Timothy C (Timothy)]

Michael Hoffman wrote:

>>> For those who don't know, these implement a hash set/map which
>>> iterates in the order that the keys were first added to the set/map.
> 
> I would love to see such a thing.

I've proposed this on python-dev, but the general feeling so far is
against it. So far the only use case is to remove duplicates without
changing order, and there are iterator-based solutions which would
normally be preferable.

It's pretty simple to roll your own, and I'll probably put together a
Cookbook recipe for it.

Tim Delaney