Learn how to create, index, slice, reshape, and perform arithmetic operations on arrays using NumPy, the most popular Python library for data science.

Arrays in Python give you a huge amount of flexibility for storing, organizing, ... That’s because an array is a data structure that uses an “index” or “key” to store each value.

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. ... NumPy arrays differ from a normal Python ...