Python filter a list to only leave objects that occur once

Question

I would like to filter this list,

l = [0,1,1,2,2]

to only leave,

[0].

I\'m struggling to do it in a \'pythoni

Answer 1

>>> l = [0,1,1,2,2]
>>> [x for x in l if l.count(x) is 1]
[0]