Uniqify a Python List

I came across this really cool blog post outlining various fast ways to remove duplicate values from a Python list. 

Here's the fastest order-preserving example:

def f12(seq):
    return list(dict.fromkeys(seq))

my_list = [1,2,2,2,3,4,5,6,6,6,6]

print (f12(my_list))

Returns,

[1, 2, 3, 4, 5, 6]

This really quick solution appears to have been identified by a chap called Raymond Hettinger, so credit where it's due!