how to insert something in the last of list python code example

Example 1: how to add item to a list python

my_list = []
item1 = "test1"
my_list.append(item1)

print(my_list) 
# prints the list ["test1"]

Example 2: append to list at index python

#!/usr/bin/python

aList = [123, 'xyz', 'zara', 'abc']
aList.insert( 3, 2009)
print "Final List : ", aList