I have a 2D array,
a, and another array,
index_list, that is a list of valid indices for that 2D array. The same index may appear more than once. I want to add one to that 2D array at every index that appears in the list of indices. If an index appears n times, I want to add one n times.
a = np.arange(9).reshape((3,3)) index_list = np.array([[0,0],[0,1],[2,2],[2,2]])
[[1,2,2], [3,4,5], [6,7,10]]