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. Indexing. This is ...

NumPy arrays have many of the behaviors of conventional Python objects, so it’s tempting to use common Python metaphors for working with them. ... or a slice, without looping in Python.

Building Random Arrays. NumPy has a few ways to build random number arrays. These methods are contained in the random library. In particular we will look at random.rand, random.randn, and ...