I want to create a list with unique elements, and a set seems like the best way to do it. However, I get "unhashable type: 'list'" error, because apparently, you can't put lists into a set. I really don't want to convert all of my lists into strings, and add that to a list, then make it a set. For example, I want to add all of these to a list, and make that a set, getting rid of b.
a = [1,2,3]
b = [1,2,3]
c = [2,4,6]
I want to be able to get elements from the set, and elements from the list too, but have unique elements.