Understanding - Advanced, exercise 31

Text

The variable my_mat contains the list of integers of a matriculation number with ten digits (e.g. [0, 2, 3, 5, 1, 4, 5, 3, 9, 8]), and my_name is a string of a given name all in lowercase (e.g. "john"). What is the value returned by calling the function chk as shown as follows: chk(my_name, my_mat).

def chk(name, mat):
    result = list()
    
    l_mat = len(mat)
    if l_mat > 0:
        max = l_mat // 2

        for idx in range(max):
            c = name[idx % len(name)]
            result.append(c)

        result.extend(chk(name, mat[:max]))      
    
    return result

Hints

The function chk is a recursive function that uses the length of the input list with the matriculation number to find a character that is part of the final solution.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_31.py in a shell, and then following the instructions on screen to specify the intended input.