Create a numpy npz file

numpy_npz.md

The .npz file format is used to save several numpy arrays into a single zipped file. Documentation.

import numpy as np

a = np.array([42])
b = np.array([2, 3, 5, 7, 9]) 

with open("foo.npz", "wb") as f:
    np.savez(f, a, b)

The .npz file can be unzipped to get .npy files for each array.

unzip foo.npz