Understanding - Advanced, exercise 36

Text

The variable my_five_chars contains the string of the first five characters of a surname. What is the value returned by calling the function do as shown as follows: do(my_five_chars).

def do(five_chars):
    idx = 0

    alphabeth = list("abcdefghijklmnopqrstuvwxyz")
    for c in five_chars:
        if c in alphabeth:
            idx += alphabeth.index(c)
        else:
            idx -= 1
    
    result = set()
    idx = idx % 5
    for i in range(idx):
        result.add(five_chars[i])
    
    return result

Hints

The function do is an iterative function that, first, compute an index using the English alphabeth, and then creates the result using such an index combined with the input.

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_36.py in a shell, and then following the instructions on screen to specify the intended input.