python append vs extend
my_list = [23, 11, 42, 24523] # append will add it as if you're adding a new list to it my_list.append([34523, 76979]) print(my_list) # extend will go over each item in the new source list and add each # element as part of the target list (my_list) my_list.extend([12, 99]) print(my_list) """ Output: [23, 11, 42, 24523, [34523, 76979]] [23, 11, 42, 24523, [34523, 76979], 12, 99] """