Concatenate two arrays (lists) in Python

Set up arrays 

list_one = [7, 6, 5]
list_two = [4, 3, 2]

Concatenate arrays horizontally 

#horizontally
merged_list = list_one + list_two
merged_list

[7, 6, 5, 4, 3, 2]

Concatenate arrays vertically 

#vertically
import numpy as np
np.vstack((list_one,list_two))

array([[7, 6, 5], [4, 3, 2]])


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