Best way to make a list unique?

Steven Bethard steven.bethard at
Tue Mar 8 23:55:08 CET 2005

Delaney, Timothy C (Timothy) wrote:
> This is actually one thing that Java 1.5 has that I'd like to see in
> Python - the LinkedHashSet and LinkedHashMap. Very useful data
> structures.
> 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.
> Such a data structure is fairly simple to implement, and removing
> duplicates then becomes:
>     unique = list(linkedset(orig))
> and you're guaranteed to maintain order.
> Implementing these is fairly simple.

Sounds like a good candidate for the collections module.  Of course 
someone will need to implement it. ;)


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