Understanding - Beginner, exercise 12

Text

Consider the following Python function:

def g(x):
    r = set()
    idx = 0
    for it in x:
        if it not in r:
            r.add(idx)
        idx = idx + 1
    return r

What is the result of the execution of g([5, 7, 7, 2, 5, 7])?

Solution

{0, 1, 2, 4, 5}

Additional material

The runnable Python file is available online. You can run it executing the command python exercise_12.py in a shell.