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

>>> from itertools import groupby
>>> repeated_items = [2,2,2,2,3,3,3,3,4,5,1,1,1]
>>> [
...     next(group)
...     for _, group in groupby(
...         repeated_items,
...         key=lambda x: repeated_items.index(x)
...     )
... ]
[2, 3, 4, 5, 1]