Understanding - Advanced, exercise 24

Text

The variable my_mat_string contains the list of a 10-digit matriculation number (e.g. [0, 0, 0, 0, 1, 2, 3, 4, 5, 6]), while the variable my_full_name contains string of a full name (i.e. given name plus family name separated by a space) all in lowercase. Study the execution of the following function when it is called as follows: r(my_full_name, my_mat_list).

def r(f_name, m_list):
    f = list()
    
    for item in m_list:
        l_name = len(f_name)
        if item and l_name:
            idx = item % l_name
            f.extend(r(f_name[0:idx], m_list))
            f.insert(0, f_name[idx])
            return f

    return f

Hints

The function r is a recursive function, which cuts the input everytime it is executed.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_24.py in a shell, and then following the instructions on screen to specify the intended input.