how to append the element in list at index in python code example

Example 1: add element to list python at index

thislist = ["apple", "banana", "cherry"]
thislist.insert(1, "orange")

Example 2: append to list at index python

#!/usr/bin/python

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