How to take two lists and combine them excluding any duplicates?

Question

I\'d like to make one list from two separate lists of unique items.

There are other similar questions but there didn\'t seem to be any that concerned doing this problem

Answer 1

Use a set.

>>> first = [1, 2, 3, 4]
>>> second = [3, 2, 5, 6, 7]
>>> third = list(set(first) | set(second))      # '|' is union
>>> third
[1, 2, 3, 4, 5, 6, 7]