Ordered intersection of two lists in Python

Question

I know that in Python, if I have:

list_1 = [1,2,3]
list_2 = [2,3,4]

I can do the following to find the intersection between the two:

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Answer 1

Use the index-method of lists as sort criterion:

l1 = [3, 2, 1]
l2 = [2, 3, 4]
sorted(set(l1) & set(l2), key = l1.index)

Out:

[3, 2]