This creates a one-dimensional NumPy array from the provided list. We didn’t specify a dtype for this array, so it’s automatically inferred from the supplied data that it will be a 32- or 64 ...

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.