Understanding - Advanced, exercise 17

Text

The variable the variables my_given_name and my_family_name contain the strings of a given name and a family name respectively, both in lower case. The variable my_mat_number contains the string of a matriculation number of ten digits (e.g. "0000123456"). Study the execution of the following function when it is called as follows: fun(my_given_name, my_family_name, my_mat_number).

def fun(given_name, family_name, mat_number):
    n = len(given_name) - len(family_name)
    if n < 0:
        n = n * -1

    num_l = list()
    for idx, item in enumerate(mat_number):
        num_l.append(int(item) + idx + n)
    
    name_l = list()
    for c in given_name + family_name:
        if c != " ":
            name_l.append(c)

    result = list()
    name_len = len(name_l)
    for idx in num_l:
        c = name_l[idx % name_len]
        result.append(c)

    return result

Hints

The function fun is organised in four blocks. The first three blocks are preparatory, and focus on the creation of two lists. These two lists are the main objects used in the last block, which is responsible to create the final result returned by the function.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_17.py in a shell, and then following the instructions on screen to specify the intended input.