For the impatient, here is how to use arrays in a nutshell. Be aware though that the behavior of arrays may be surprising at first, so we encourage you to read on after this introductory section.
Note again, the presentation in this chapter assumes like everywhere else in this book that you have the module NumPy imported:
from numpy import *
By importing NumPy, we give access to the datatype ndarray, which we'll describe in the next sections.