Numpy Array Indexing and Selection. Now that we know how to build arrays, let's look at how to pull values our of an array using indexing, and also slicing off sections of an array. ... Slicing with ...

The most common scenario for using Cython with NumPy is one where you want to take a NumPy array, iterate over it, and perform computations on each element that can’t be done readily in NumPy.