The most effective way to learn to read traceback is to be wrong. Therefore, there are errors in the print_list() function below that you need to fix. After each fix, you can run the code and read the traceback to find a new error.
If the function is called in the following way: print_list([1, '2', 3, '4']), then the output should be like this:
2
0
4
You do NOT need to call a function in the code section. Just fix the code and bring it to working condition.