This creates a two-dimensional NumPy array, each dimension of which consists of a range of numbers. (We can create arrays of any number of dimensions by simply using nested lists in the constructor.) ...

Numpy Arrays Basic Ways to Build Arrays. We can cast an ordinary python list as a NumPy one-dimensional array. import numpy as np my_list = [1, 2, 3] np. array (my_list) # cast a list into a 1D array.

This NumPy version performs admirably, clocking in at around 28.77 ns per element -- almost two times faster than the pure Python rendition. Comparison established -- we have a clear winner. However, ...