Understanding - Advanced, exercise 28

Text

The variable my_mat_list contains the list of integers of a 10-digit matriculation number (e.g. [0, 0, 0, 0, 1, 2, 3, 4, 5, 6]), while my_chars contains the string with all the alphabetic characters in lower case included in your full name (given name followed by the family name, i.e. for the name John Doe we have the string "johndoe"). What is the value returned by calling the function sc as shown as follows: sc(my_chars, my_mat_list).

def sc(chars, mat_list):
    n_op = []
    
    ln = len(mat_list)
    for idx in range(ln // 2):
        cur = mat_list[idx] + mat_list[ln - (1 + idx)]
        n_op.append(cur)
    
    result = set()
    for n in n_op:
        c = chars[n % len(chars)]
        result.add(c)
    
    return result 

Hints

The function sc is an iterative recursive function that uses the lenght of the matriculation number to select the characters in the input string.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_28.py in a shell, and then following the instructions on screen to specify the intended input.