How to remove duplicate items from a list using list comprehension?

Question

How to remove duplicate items from a list using list comprehension? I have following code:

a = [1, 2, 3, 3, 5, 9, 6, 2, 8, 5, 2, 3, 5, 7, 3, 5, 8]
b = []
b =         


        

Answer 1

The reason that the list is unchanged is that b starts out empty. This means that if item not in b is always True. Only after the list has been generated is this new non-empty list assigned to the variable b.