Misuse of list comprehensions?

[Bruno Desthuilliers]

John Salerno a écrit :
> I posted this code last night in response to another thread, and after I 
> posted it I got to wondering if I had misused the list comprehension. 

(snip)
> def compress(s):
>     new = []
>     [new.append(c) for c in s if c not in new]
>     return ''.join(new)

As far as I'm concerned (and I'm a big fan of list-comps, generator 
expressions etc), this is definitively an abuse. And a waste of 
resources since it builds  a useless list of 'None'.