python: check if an numpy array contains any element of another array

Question

What is the best way to check if an numpy array contains any element of another array?

example:

array1 = [10,5,4,13,10,1,1,22,7,3,15,9]
array2 = [3,4,9,1         


        

Answer 1

You can use any built-in function and list comprehension:

>>> array1 = [10,5,4,13,10,1,1,22,7,3,15,9]
>>> array2 = [3,4,9,10,13,15,16,18,19,20,21,22,23]
>>> any(i in array2 for i in array1)
True