diff lists

[Carel Fellinger]

Oliver Vecernik <vecernik at aon.at> wrote:
> Hi,

> I've got following two lists:

> ['a', 'b', 'c', 'd', 'e', 'f']
> ['e', 'c', 'f']

> I'd like to have the result:

> ['a', 'b', 'd']

> The list need not to be ordered. ['d', 'a', 'b'] will also be ok. What
> is the most effective way to achive that result?

Like proposed in an other thread, dicts are nice to uniquize lists, like:

d = {}
for k in a:
    d[k] = 1

for k in b:
    try:
        del d[k]
    except:
        d[k] = 1

c = d.keys()

-- 
groetjes, carel