Concatenate NumPy arrays

NumPy arrays can be concatenated by concatenate().

import numpy

a = numpy.array([7, 8, 9])
b = numpy.array([4, 5, 6])

c = numpy.concatenate((a, b))

print(c)  # [7 8 9 4 5 6]

Side note, Python lists can be concatenated by simply using +.

a = [1, 2, 3]
b = [4, 5]

c = a + b

print(c)  # [1, 2, 3, 4, 5]

NumPy Array

NumPy Tutorial