Differen in Python list

Question

If List A= [1,2] and List B=[2,4]

I want the difference between A and B which is present in B.

that is, diff between A and B is [1,4]... should be present in B... SO the final output should be C=[4]

did you try something ? – Matei Florescu Sep 10 '20 at 08:50 — Matei Florescu, Sep 10 '20 at 08:50
You could use sets. `set(B).difference(set(A))` – Matthias Sep 10 '20 at 08:54 — Matthias, Sep 10 '20 at 08:54

score 0 · Answer 1 · answered Sep 10 '20 at 08:56

0

use sets()

A = {1,2}
B = {2, 4}

print(B.difference(A)) 
or
print(B - A)

answered Sep 10 '20 at 08:56

KayseMca

score 0 · Answer 2 · answered Sep 10 '20 at 08:58

0

Using the XOR ^ operator in set:

lst_A = [1,2]
lst_B = [2,4]

print(list(set(lst_A) ^ set(lst_B)))

OUTPUT:

[1,4]

answered Sep 10 '20 at 08:58

DirtyBit

From the question: "the final output should be C=[4]". So not the symmetric difference. – ekhumoro Sep 10 '20 at 09:07

2 Answers2