Uniquifying a list?

[Edward Elliott]

You could do

 >>> uniq = [x for x in set(myList)]

but that's not really any different than what you already have.

This almost works:

 >>> uniq = [x for x in myList if x not in uniq]

except the r-val uniq isn't updated after each iteration.

Personally I think list(set(myList)) is as optimal as you'll get.


Tim Chase wrote:
> Is there an obvious/pythonic way to remove duplicates from a list 
> (resulting order doesn't matter, or can be sorted postfacto)?  My 
> first-pass hack was something of the form
> 
>  >>> myList = [3,1,4,1,5,9,2,6,5,3,5]
>  >>> uniq = dict([k,None for k in myList).keys()
> 
> or alternatively
> 
>  >>> uniq = list(set(myList))
> 
> However, it seems like there's a fair bit of overhead here...creating a 
> dictionary just to extract its keys, or creating a set, just to convert 
> it back to a list.  It feels like there's something obvious I'm missing 
> here, but I can't put my finger on it.
> 
> Thanks...
> 
> -tkc
> 
> 
> 
> 
>