here taking the user_input - insert 1 5 and coverting this to ['insert', '1', '5'] using split() and hence using indexing

if name == 'main': N = int(input()) my_list = []

for iterations in range(N):
    user_input = input().split()

    if user_input[0] == 'insert':
        my_list.insert(int(user_input[1]), int(user_input[2]))
    elif user_input[0] == 'print':
        print(my_list)
    elif user_input[0] == 'remove':
        my_list.remove(int(user_input[1]))
    elif user_input[0] == 'append':
        my_list.append(int(user_input[1]))
    elif user_input[0] == 'sort':
        my_list.sort()
    elif user_input[0] == 'pop':
        my_list.pop()
    elif user_input[0] == 'reverse':
        my_list.reverse()