python-numpyHow to join 3 Numpy arrays

Usage example

import numpy as np
a = np.array([1, 2, 3, 4])
b = np.array([5, 6, 7, 8])
c = np.array([9, 0, 0, 9])

joined = np.concatenate((a, b, c))
print(joined)

output

[1 2 3 4 5 6 7 8 9 0 0 9]