how to add arrays in python code example

Example 1: for element in array python

itemlist = []
for j in range(len(myarray)):
    item = myarray[j]
    itemlist.append(item)

Example 2: python add element to array

my_list = []

my_list.append(12)

Example 3: python arrays

arr = [1,"two",3.0,"four",5]