Welcome to NumPy. We set expectations for the course, install or verify NumPy in your environment, and contrast plain Python lists with the ndarray. You will see why numeric libraries build on C-backed arrays, how to import the library as np, and how this course connects to Pandas and machine learning stacks. Check that import numpy as np; np.__version__ runs, and you can create a first small array in a REPL or notebook before the next module.
