csguy11 csguy11 - 4 months ago 8
Python Question

How to find list intersection?

a = [1,2,3,4,5]
b = [1,3,5,6]
c = a and b
print c


actual output:
[1,3,5,6]

expected output:
[1,3,5]


How can we achieve a boolean AND operation (list intersection) on two lists?

Answer

If order is not important and you don't need to worry about duplicates then you can use set intersection:

>>> a = [1,2,3,4,5]
>>> b = [1,3,5,6]
>>> list(set(a) & set(b))
[1, 3, 5]
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