How can I change the iteration variable inside a for loop in python

Question

Can you give an example using a nested for loop?

Answer 1

Assume you have a list of lists:

my_list = [ [1,2,3] , [4,5,6] , [7,8,9] ]

for lists in my_list:

    for val in lists:

        print(val)

First loop will go through each list inside my_list and the second loop will go through each element in each list