remove list elements..

[chris.monsanto at gmail.com]

On Oct 5, 10:27 am, Abandoned <best... at gmail.com> wrote:
> Hi..
> I have a problem..
> list1=[11, 223, 334, 4223...] 1 million element
> list2=[22,223,4223,2355...] 500.000 element
>
> I want to difference list1 to list2 but order very importent..
>
> My result must be:
> list3=[11,334,...]
>
> I do this use FOR easly but the speed very imported for me. I want to
> the fastest method please help me.
>
> I'm sorry my bad english.
>
> King regards..

Research the "set" data type. :)