delete duplicates in list

[Corrado Gioannini]

On Wed, Oct 29, 2003 at 10:02:08PM +0100, christof hoeke wrote:
> there should be an easier or more intuitive solution, maybe with a list 
> comprehension=
> 
> somthing like
> 
> >>> b = [x for x in a if x not in b]
> >>> print b
> []
> 
> does not work though.
if you want a list comp solution, similar to the one you proposed and valid
also with python < 2.3 you could do:

>>> a = [1, 2, 2, 3]
>>> b=[]
>>> [b.append(x) for x in a if x not in b]
[None, None, None]
>>> b
[1, 2, 3]

or even:

>>> a = [1, 2, 2, 3]
>>> [b.append(x) for b in [[]] for x in a if x not in b]
[None, None, None]
>>> b
[1, 2, 3]

Corrado.
-- 
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