I have 2 array:
old_array = [[1,2,3],[4,5,6],[7,8,9]]
new_array = [[10,11,12],[1,2,3],[4,5,6],[13,14,15]]
is there an easy algoritm to remove the rows who are already in old_array from new_array, so that the value of new_array is eventually
new_array = [[10,11,12],[13,14,15]]
? Thanks already !
CodePudding user response:
[i for i in new_array if i not in old_array]
CodePudding user response:
You could use set differences:
>>> np.array(list(set(map(tuple, new_array)).difference(set(map(tuple, old_array)))))
array([[13, 14, 15],
[10, 11, 12]])