sum two arrays python code example

Example 1: calculate the addition of two lists in python

list1 = [1, 2, 3]
list2 = [4, 5, 6]

# `zipped_lists` contains pairs of items from both lists.
# Create a list with the sum of each pair.
sum = [x + y for (x, y) in zip(list1, list2)] 

print(sum)
# [5, 7, 9]

Example 2: append two 1d arrays python

numpy.r_[a, a],
numpy.stack([a, a]).reshape(-1),
numpy.hstack([a, a]),
numpy.concatenate([a, a])